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I recall reading on HN a while back that a modern z/OS mainframe can run unmodified System/360 binaries.

Well, there was the shocking news here not long ago that some OS\360(?) backwards compatibility had been dropped. What's the world coming to.

Relevant to Fortran, there's a version of ESSL that I recall on OS\370 now for POWER9 (and doubtless 10). Scientific subroutine libraries are arguably the best example of the re-use beloved of those who haven't seen their OOP code last decades.

wine can also run unmodified windows binaries

Yes and if those windows binaries were from a platform from over 50 years ago then perhaps your snarky quips would come off as intelligent.

Windows 3.1, released on April 6, 1992 - so only 29 years old.

My bad, the 21 years difference must be important (somehow?)

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