POSIX is full of aspects that all OS provide greater guarantees or in some cases even deviates. It makes no sense to gratuitously / carelessly remove some of th

POSIX is full of aspects that all OS provide greater guarantees or in some cases even deviates. It makes no sense to gratuitously / carelessly remove some of those guarantees and ask the world to fix their "obviously" broken programs that nevertheless worked perfectly on this (previously not really disputed) point during decades -- especially if the advantages such changes seem to be able to provide are not clear at all...