What standards? The old init systems were a loose collection of shell scripts that were wildly different on every distro. Other tools like sudo also broke the established standards of the time, before it you had to login as root with the root password.
Even gnome and KDE have their own themeing standards as well as other ways of doing things. Even network manager is its own standard not following things that came before it. Then there are flatpack, snaps and app images. Not to mention deb vs rpm vs pacman vs nix package formats. Loads of things in Linux userland have broken or evolved the standards of oldern times.