Not much, but I'm thinking torrents specifically. - "url" and "x" are irrelevant if a magnet link is shared - torrents can contain multiple files, thus "m" also becomes irrelevant there Plus it would be generally nicer to have a separate kind for torrents only. I looked through some kind 1063-s and found 0 magnet links in my admittedly very limited search. Not surprising. Lots of images/videos being shared. Would be nice to separate torrents.

I see. Still I think it's best to avoid fragmenting the protocol by having multiple file metadata standards. I don't think duplicating hashes and url/webseed is that big of a deal considering the benefit of having the sha256 and infohash be in their own tags and thus indexed/queryable on relays.