[dublin]

It actually works very well. Phones/tablets are now more capable than many PCs/Macs. When you've literally got more compute power, RAM, storage, and network bandwidth than supercomputer centers had 15-20 years ago in a phone or tablet-sized package, all you really need is a nice dock to plug it into for display (I'll take a 42" multitouch/pen setup like the Surface Studio, please), keyboard, mouse, and network.

BTW, I've done exactly this daily with the only slightly larger Surface Pros and docks for over a decade, so the concept definitely works, and there are probably millions of people using it, contrary to your assertion.

It's a very small step from doing that with a PC or tablet to doing that with a folding phone design, and there are a few such solutions like that today. (Though they should run the same OS/interface, just morphed slightly for the hardware that's active.)

After having this setup, I will never, ever, go back to an old caveman laptop or desktop computer.