They point to the many uses of a port besides charging its battery: to charge and sync iOS and other devices; for tethering a phone or tablet to use its cellular connection; to connect to monitors, printers, and scanners; and more esoteric uses, like target disk mode, in which a laptop can be mounted as a disk on another Mac.
In fact, that's how I use my laptop! But here's the thing: when you use technology versus write about it, you're a pundit for yourself. Unless you make a special effort, your use case seems like the preferred one--you see it every day, it makes sense to you, and everyone else appears to be an outlier.
As a tech writer, though, I try to break through the barrier of my own choices, and make sure I understand how everyone works. It's often difficult to know whether I've found a pocket or people or a widespread trend, but I rely on where companies invest their money in new products, reported and estimated sales figures, and how third-party ecosystems grow or fail.
What shakes out with the new MacBook is the difference between what I'd call a nomadic desktop user, who is an often reluctant mobile road warrior; and the mobile-first or mobile-only user, for whom a computer is like a bigger, different smartphone or tablet, and their usage pattern mirrors that.
Nomadic desktop roamer
Creating makeshift shelters of desks and electronics wherever they roam, the nomadic desktop user expects to have and needs external devices to carry out her work. This includes an external monitor (or maybe two), at least one external drive, and one hopes a gigabit ethernet connection.
As one of this herd, I sympathize. I've always treated a laptop as an accessory to my main machine, which was a desktop computer, whether all-in-one, a Cube, or a tower. I resisted an Air for years, and bought a 15-inch MacBook Pro a few years back. But I sold it months later when I realized it was just too hurking for my needs. A mid-2011 MacBook Air has been my stalwart companion since.
More recently, set up in a co-working space, my focus shifted so that my laptop became my main computer and Mac mini my adjunct machine, used occasionally.
But I'm still tethered to the trappings of desktop life. At my co-working space, I've left a DisplayPort-equipped Asus monitor, a USB 100Mbps ethernet adapter, a charger, a keyboard, and a mouse. Also, the kitchen sink.
For we breed of nomads, a MacBook could be a hard sell unless and until clever docks are introduced. These are expected. A single dock, likely requiring external power, could handle DisplayPort output, and a USB 2/3 hub, as well as pass-through power. So far, USB-C network adapters haven't been discussed by Apple or others, but it should be possible, and that would be a must-have dock item as well.
Even with a dock, we're going to feel less capable with a single port or with USB-C as our only wired interface. We don't want to carry piles of adapters or a dock--the worst thing we have to do is pack separate mini-DisplayPort-to-DVI and -VGA dongles if we're expecting to give presentations on the road.
I'm likely an outlier in that category by owning a MacBook Air over a MacBook Pro. While I run Adobe InDesign, Lightroom, and Photoshop regularly on my MBA, it's a stretch and often involves tedious delays that I wouldn't encounter with an MBP. Still, I prefer the flexibility.
For my confreres, though, you're more likely regularly plugging in external hard drives, and if you're lucky enough to already be working at Thunderbolt 2 speeds, even a dock doesn't help, as you'd be knocked down to 5 Gbps with the new MacBook at best.
The sweet spot of the MacBook is aimed squarely at the person who lives on a laptop and rarely, if ever, has need of its ports except for charging. They often find themselves infrequently able to plug in, and they need battery life long enough to let them not worry about that.
When you look at sales figures of wired peripherals, where they are stocked, and what kind, it's clear that wireless has won the day wherever it's possible--as with printers and networking--and that a relatively small number of users combine laptops with the regular use of external storage and other devices that benefit from the highest of high-speed performance.
What those users look for is the time between charges, not the capabilities when tethered. Apple describes the 2.03-pound, 12-inch MacBook as having nine hours of wireless web, the same as the 2.38-pound, 11-inch MacBook Air, and both get an hour more when just playing video. Apple shrinking the logic board and pumping in more battery in empty spaces certainly had an effect. (The 13-inch MBA weighs 2.96 pounds and Apple estimates 12 hours of routine use.)
The iPad Air 2 weighs half as much (0.96 or 0.98 pounds) but gets 10 hours for any mix of surfing, streaming, and viewing. It's clear Apple sees the range of 9 to 10 hours as ideal to go without a charge.
But do these folks never plug anything in to a laptop, except an iOS device to charge it David Brennan responded to a query about "no port" users, by noting that he uses a Mac mini for more intensive tasks, but carries around a MacBook Air of my vintage for everything else. "I could live quite happily with no ports," he writes, and a MacBook is on his list for when his current MBA battery is past its prime.
Chris Brennan, a colleague from across the pond in the UK, noted that in his personal use he's gradually become almost entirely untethered already. Even when he's at work, "My printer is wireless, as are the keyboard and mouse in the office." Between ubiquitous Wi-Fi, wireless peripherals, cloud storage, and the long battery life of a MBP, he can see living off one dual-purpose port.
And James in the UK noted similarly that all the purposes to which he used to need a USB port, such as a flash drive, he now relies on Dropbox and other cloud services. He writes, "I'd bet that there's a middle ground between people who've worn the gold off their USB contacts and me, who think they use the ports most months, but actually only use it once or twice a year, and would cope just fine if it wasn't there."
Add to this picture that USB-C will allow bidirectional charging: you'll be able to get third-party batteries inexpensively with multiple ports that can be both power source and hubs. This will make the rarely pluggers even more able to live away from the grid.
Painting a rainbow
The new MacBook is polarizing, because it reveals some of our fears about the direction Apple seems to be taking. I mean, by all that's holy, they took our floppy drive! Our optical drive! Our FireWire! What...will they take next!
Veteran Mac users feel this most of all, because events of the last 15 years have whipsawed us with changes every two or three. For the right user, the one-port MacBook is a fine compromise, even if there could have been two. For the wrong user, Apple still has a whole line-up of other computers, many aimed at us nomads.