How about the mechanical keys on the alienware m15 / m17?
https://dell.alienwarearena.com/alienware-debuts-the-worlds-...
I have half a mind to buy a really rough looking PB G4, gut it, and see what kind of very small Pi or N100 shaped thing I can fit inside.
Still on the lookout for anything that’s not chiclet based, but they literally don’t exist.