Related: topic #26347 topic #21922 forum #216584 topic #16874 probably others
IDK, it just feels unnecessary to have qualifiers like "vocaloid" "utau" "synthesizer v". If people want art related to Vocaloid, there's already a copytag for that. Also chartags for specific virtual singers. (I'd also argue that other times, the Vocaloid copytag feels stupid, especially since well you can't see the vocaloid and it's much more common nowadays for song creators to put original characters in the PVs instead of ones based on virtual synths).
forum #216584 claims the reason we have (vocaloid) as a qualifier is because it would otherwise be ambiguous (rather than for wildcard searches like the forum was trying to use it for). But is Rolling Girl (vocaloid) or Aku no Musume (vocaloid) really that ambiguous? And if it is ambiguous, why couldn't we qualify it with the producer name instead (since there are definitely cases of multiple vocaloid songs by different producers with the same name)? Not to mention songs that were originally vocaloid but kind of grew into their own franchises/began being covered by human singers instead like Kagerou Project (kagerou project) and Chuubyou Gekihatsu Boy(s) (originally a Kagamine Len song that is now its own thing with a light novel series and anime adaptation).
Main reason to not do this is uhhh well we got 93 pages of copytags with the vocaloid qualifier and that's exhausting.
This is probably a bit rambley and nonsensical but at least wanted to get a conversation going. Previous conversations seem to have stalled out based on a lack of consensus as to what to qualify the copytags with instead, but my opinion is that half the time they don't need a qualifier in the first place.