The use case seems pretty limited:

“when I’m on the go and I don’t have room in my bag for a full-sized laptop”

First, if you’re on the go, do you need a computer with you? Second, if you do, that’s what a dedicated laptop bag is for.

First, if you’re on the go, do you need a computer with you?

Is that a real question? LOL

Well, I’m technically “on the go” right now and my phones work fine.

Phones come with a 6" screen and no keyboard. You do realize there’s an entire market of “on the go” computers?

I do, but if you need an actual computer, say for work or something, they don’t cut it. They’re cute, but as you see above, the limitations drag them down.

By the time you put in the gear to make them workable, you might as well just pack a proper laptop.