> POSIX compliance totally matters for interactive use, too, if POSIX is what you know. Nobody knows the entire spec, implementing it only matters for compatib

> POSIX compliance totally matters for interactive use, too, if POSIX is what you know. Nobody knows the entire spec, implementing it only matters for compatibility with existing scripts that can use every features. For interactive use, keeping the same interface for the most common use-case is enough. Switching to non-POSIX tools is well worth the moderate effort if performance matters, but that's my point: performance doesn't really matter for these tools. Anything that's not orders of magnitude slower is good enough.