I can imagine, though, that more(1) in that case would eventually fork, so that some software depended on my-more and others on his-more and still others on her

I can imagine, though, that more(1) in that case would eventually fork, so that some software depended on my-more and others on his-more and still others on her-more. And that-other-dude's-more would have a security vulnerability, and no-one would update it, and we'd all get pwned, oh the embarrassment.