Perhaps all I want is to have a "Not yet implemented" indicator on the Generalist badge description, if How many tags needed to earn the Generalist badge? is to be believed.
But actually, I'd rather have it defined better and then implemented, such as "Has earned the Nice Answer badge on questions that cover at least 20 tags, can only be awarded once per user", and then have someone (me?) come up with a query to find those people.
No reason why it can't be awarded long after it's been earned, and the logic adjusted so that each user gets checked when they earn a 'Nice Answer' badge.
But at the very least, can't we get the badge description improved?