Not even hypothetical. See ATmega328P. It has no business being an actively supplied chip if we were to only care about technological supremacy of architectures and/or chip construction. Or countless "e8051" chips based on Intel 8051 microcontroller being https://xkcd.com/2347/ of USB.
Could Amazon or Facebook do this if they just wanted to, e.g. to help break the hold of their competitors on markets they care about? Absolutely.
Could some hobbyist do it? Not on their own, but if you do part of it and someone else does part of it, the whole thing gets done. See e.g. Asahi Linux.
is this even doable?