Not so fast there my friend. Ratfor was used a great
deal. For
instance The PGI compiler folks wrote a parallel optimizing compiler
for the FPS-164 in it. And FPS used it for there OS. Plus Apollo
wrote all their original utilities in it.
The Software Tools stuff too, including the STVOS stuff Berkeley
managed. If you pick an old platform and count RATFOR implementations,
all of them seem to have enough of them you can't swing a dead cat.
RATFOR may not be enjoyable in modern terms, but compared to building in
native F66...
De