I see why this is tricky, because I'd argue a Mac Mini fulfils that requirement - but it doesn't do the power delivery aspect. If you ignore the power requirements it becomes much easier.
It'd be a small market for sure, which is why I don't think you see it. Personally I'd maybe grab a MacBook Air or something as that is likely the best
"power to weight" ratio for a laptop.
Your mention of the Framework desktop case seems like it would work no? As it can be powered over USB-C? Or does it not do output over the same port?
It's funny because I searched for it and Intel has a page on this exact thing about their lineup of NUCs - https://www.intel.com/content/www/us/en/support/articles/000...
It'd be a small market for sure, which is why I don't think you see it. Personally I'd maybe grab a MacBook Air or something as that is likely the best "power to weight" ratio for a laptop.
Your mention of the Framework desktop case seems like it would work no? As it can be powered over USB-C? Or does it not do output over the same port?