There's a bunch of stuff in POSIX no one really implements. Pax and SCCS spring to mind (although SCCS is optional, IIRC). I'm sure there's more you will find m

There's a bunch of stuff in POSIX no one really implements. Pax and SCCS spring to mind (although SCCS is optional, IIRC). I'm sure there's more you will find missing on a fair number of modern systems. And the person who was there says "Stallman wanted X because Y". That there may be other good reasons for X is besides the point, but recollecting the argument at the time doesn't make one " ignorant and clueless". What a ridiculous comment. Furthermore, in a quick search it seems that m4 wasn't added to POSIX until the early 90s. So that makes it doubly besides the point and doubly ridiculous.