Oh yeah I didn't know that one. I do know Logitech has some ultra-thin ones too though. Very good keyboards too. They'd do nice in a laptop as well.
I'd very gladly sacrifice thinness for a decent keyboard. The Thinkpads had an OK compromise for a while but since the Thinkpad T14s gen2 or so they have been horrible as well. My old T490s was still serviceable.
One space that I don't think I've seen explored is building a laptop around a tiny, ultra-low-power passively cooled SoC board that can easily fit beside the keyboard instead of under it in a 12"-16" chassis and saves space that'd otherwise need to be dedicated to cooling. That'd buy a substantial amount of Z-budget for a quality keyboard without blowing up chassis thickness.
Naturally this laptop wouldn't be suited for some types of work due to lack of horsepower, but there's always tradeoffs somewhere.
That's why I've been thinking of paring my desktop-replacement 16" laptop with a Pocket Reform or something like that.