User blog comment:DaNASCAT/Technical Update: January 6, 2016/@comment-24473195-20160107161235/@comment-1251315-20160107184622

And I'm not just some "average admin" who doesn't understand JS, so I don't appreciate the insinuation that I somehow have no understanding of JS. Just because I see no feature benefit in switching from UserTags to ProfileTags does not mean I am clueless.

And anyway, the kind of code you are suggesting would be against TOU anyway, with or without JS Review in place, so your example is meaningless.

As I understand it, ProfileTags only works per-wiki. UserTags, while more complex, can be used individually by users in their own JS files (which overrides any JS used in Common.js). That is the main benefit between the two. Again, as I said, if ProfileTags can be used by users individually in their own JS files, then maybe I'd convert, but it's unlikely as UserTags has a complex system which is more expansive than the basic system.