That's just a technical problem that new infrastructure can solve by abstracting away the name. Instead of visiting 1e873645-1f68-4b48-9eae-934ec717229b.com/foo, you're just visiting "bar/foo", where 'bar' is their name. Click on the URL and the full hashed version is revealed for proper sharing.
In the same way that nobody memorised Facebook's UUID of a person, they can just remember their name.