Well, it will still work but you'll lose the benefit of it.

Most of these don't look like SHOUTING to me. They look uppercase but not aggressive.

You don't want upper-case in URLs for social reasons. It simply looks out of place, takes more screen real-estate, and stands out unnecessarily.

I'm just saying, if canonical is good enough, "S/5" fix isn't sufficient to get a whole new standard then. If it isn't good enough, then the value this one promises over Crockford is arguable due to lack of I/l/1 aliasing.