Yeah, you can almost buy two phones for that price. There you go, wireless foldable

I can buy at least my 3 last phones with this price

Need bordless phones and a frame to clip them together

Congratulation, you just made Surface Duo.

For me the biggest issue, frequently hearing and reading about broken inner screens, is that it makes the screen a consumable, which socks.

You mostly hear about the bad ones. Mine has been doing great for almost 2 years now. I use it in a clean environment, I'm very careful and not clumsy, so that helps.

Target is probably people only use phones, no note PCs. If you use note, its generally better to tether by phone and view and input from note.