@Aaron Ah thank you Aaron. I've been going a bit mad this week tagging old questions with repeats. I've been trying to pick some of the best ones and only bumping a few a day. I hope nobody is too bothered by this. I'm already finding it a bit repetitive myself.

@Aaron I did read your answer, followed the links, and found there are actually many posts across the SE network basically asking for a solution to adding new tags to old questions. I posted a summary/rant on Meta.

@ElementsinSpace FWIW, I've thought you've handled the gradual retagging really well. Certainly hasn't bothered me any. I went through a similar re-tagging period myself and ran into the same frustrations.