> It didn't account for the presence of a '--' to end the parsing of named arguments but that's it
That’s just something getopt does and some programs adopted. If you asked me to write a parser, I wouldn’t necessarily include that either if you didn’t ask for it.
> You have to have `--` or something similar to have a correct program
No, only if the positional arguments need to support arbitrary strings. If you have something like a package manager and the first positional argument is the subcommand and everything after is an alphanumeric package name, you don’t need to support the double dash.
