Windows has ostensibly been, or at least has been claimed to be, “POSIX compliant” for much longer than that. I think however technically true that might be, a

Windows has ostensibly been, or at least has been claimed to be, “POSIX compliant” for much longer than that. I think however technically true that might be, a good heuristic for why Windows is “other” in this categorization is how frequently things are reported as broken in Windows environments when they don’t have any other platform-specific issues across many *nixes. Sure that divergence might not be specific to POSIX, but a more general “every other system from every other vendor agrees broadly on ___ but if you use Windows your environment needs special accommodations.” Anecdotally, the surface area of this divergence is basically equivalent to any project which constructs file paths, and/or executes subcommands, unless special care was taken prior to address Windows specifically. And Windows is certainly entitled to its own particularities and idiosyncrasies! But it’s not entitled to have those and be regarded as not having them at the same time. That would be absurd.