Thanks, I know the device type, just had never heard them called "2in1"
My wife has a 10" Lenovo tablet with detatchable keyboard which is pretty neat, of course the downside is that it runs W10. I should probably investigate what are the best devices to get a proper distro running in.

One thing of course is the kind of mechanical construction the hinge has; if it is detachable it needs to be fairly sturdy to not break or bend easily.... And if it is non-detachable that is probably good too provided the device is thin enough to be pocketable.

There is the root of the problem; to be always with you the device should be maybe 7" maximum size, yet to be usable it needs to be at least 12"...
No way yet to solve that, without totally rollable/foldable designs