I am wondering if we need the basic-concepts tag (221 threads). It looks like an archetypal meta tag to me, and the SE policy is to not tolerate meta tags. We do have some particular exceptions to this rule on CV (such as [self-study]), but [basic-concepts] does not seem to be useful at all: it seems to be used randomly with many hundreds of "basic" questions not having this tag.
Therefore my suggestion is to eliminate it.
The problem is that it has a lot of threads. We have recently manually removed another meta tag big-list, but this involved editing below 40 questions. There was a recent question about best-practices with what seems to be a consensus to get rid of this tag; but it has over 60 threads and manual removal will be tedious and annoying (because of bumping to the front page). With basic-concepts we are talking about 200+ threads.
If we agree that basic-concepts is useless and should better be removed, can we actually ask SE developers to burninate this tag? SE developers can perform automatic no-bump removal of a tag from all threads; this is called "burninating" a tag. See When to burninate on Meta.SE:
You probably shouldn't bother [to remove a tag manually] if there are more than a few dozen questions. [...] For tags that involve large numbers of questions, just flag the burninate-request and leave a note for the mods that the cleanup is done. They'll pass this along to someone like me [SE admin], I'll verify that you didn't lie about the sanity-checking and cleanup, click a button, and it'll be like the tag never existed...
I have re-tagged all the threads that had [basic-concepts] as the only tag. This tag is now ready to be burninated. I am putting [burninate-request] tag on this meta thread.