[yjftsjthsd-h]

> as soon as scripts were allowed to use commands, those commands could never be changed

That's not a script thing, that's an API surface thing, and even then only applies to backwards-incompatible changes. You can change the arguments to git or chmod just as easily as printf() or fork()

[iraqmtpizza]

As I said here already, the difference is that scripts are interpreted, rarely if ever check what version they're running on before they attempt to do something, and the authors of the scripts have been explicitly encouraged to memorize a heapload of letter permutations and throw a thermonuclear systemd-sized fit if something changes.

None of this is inherent to APIs.