“To begin with, it's weird that versions are strings.” - what else would they be? An audio tone at a particular frequency? A vibration pattern? It’s written communication. Perhaps he’s just confusing data types with how they are communicated. But then, you’re free to use any data type you wish. If I’m not mistaken, Ubuntu & Jetbrains both use date fields in their versioning. Still communicated as a readable string.

He proposes tuples, but doesn’t care for semver. So what would the tuple mean?

As a human race, I’m sure we can do better with versioning semantics. Perhaps I’ll put some more spare personal time into that semantic schema kit I was designing. Ultimately it’s about data types, containment and meaning. And his proposal ignores most of that.