Agreed. Milestones make sense if they are used for actual milestones (i.e. target code pushes). They may also make sense for major goals, *IF* (and IMHO this is a big if) we are confident that no bug could ever be relevant to more than one major goal.

Curated should definitely not be a milestone, if milestones are being used for anything else - because it could overlap with almost any other taxonomy.

I'm afraid I still don't understand what we gain by trying to shoehorn something into the Milestones system rather than using tags. Is it just that we want to use it because it's there? ;-)