I don't want this to get distracted by chasing examples. If any of these are systemic, I'm curious. That said, my assertion was that evidence is the algorithm

I don't want this to get distracted by chasing examples. If any of these are systemic, I'm curious. That said, my assertion was that evidence is the algorithms in question are still valid. Usually, they are still champions in speed. Certainly, folks have had to port and maintain the fortran compilers. Especially so to add targets. But the very stability of fortran, the language, is a big boon to those implementations not having bit rot. And while I know they could be reimplemented, in what language? And to what real advantage?