It has USB-C charging as well. I think that's sort of the best of both worlds, it's not like a barrel connection adds much to the board, and it means you can run it from a much less complex power supply.

It does mean it has an extra port that you might find unnecessary, but at the kind of prices they're selling this at including a usb-c charger would actually add a fair bit to their costs, and you can buy an aftermarket one pretty easily.