As I said, patches to improve the situation are welcome, and if they match with current internet practices they will likely be accepted.

It is still the case that such URLs are likely to require extra work on the part of the application to deal with the other unicode parts (your linked reference reinforces that).  So, IMO it would be *better* if someone would do an IRI module.  But the fact that nobody has stepped up for that should not prevent us from improving the situation in other ways.