Interesting aside - the Intel Quark line was seemingly based on the 486[1], albeit with a substantial process change (600 nm to 90 nm) and some modifications to

Interesting aside - the Intel Quark line was seemingly based on the 486[1], albeit with a substantial process change (600 nm to 90 nm) and some modifications to support the Pentium ISA. So the 486 didn't just live on to be sold to industrial users as-is, it evolved and reappeared in some embedded systems running at a not too shabby 400MHz (originally the 486 ran at 25-100MHz). On a similar note, I think earlier Atom chips were largely based on the original Pentium (not Pro, not II or III) but maybe take that with a pinch of salt as I don't 100% remember where I read it :-) [1] - https://semiaccurate.com/2013/10/28/intel-talks-little-quark https://semiaccurate.com/2013/10/28/intel-talks-little-quark