This is very cool. The problem with POSIX is that, while it's possible to implement the bare minimum, it's hard to not have a few extensions. There are some tr

This is very cool. The problem with POSIX is that, while it's possible to implement the bare minimum, it's hard to not have a few extensions. There are some truly braindead ideas that GNU coreutils have absolutely improved upon. Sadly, a new coreutils collection simply brings further incompatibility. There's already significant switching logic out there to handle BSD vs GNU coreutils (have you ever used sed -i?), adding another flavor makes this sort of thing dead on arrival, at least to me. I'm not retrofitting my scripts to support these implementations too. Aside, Nix is the only real solution to this problem, as it can replace these tools wholesale, hermetically. Being able to depend on a specific implementation in a portable manner is rather compelling.