In practice, external batteries are so cheap these days and easier than ever to charge your laptop from with usb-c, it's less of an issue than it used to be. It

In practice, external batteries are so cheap these days and easier than ever to charge your laptop from with usb-c, it's less of an issue than it used to be. It certainly holds up with phones and smaller devices, though. I'd think the best argument for a thicker MBP would be greater cooling potential anyway.