I hope most of us can agree that there's a problem with tag misuse.
(And I'm sure we'll all disagree on how severe this problem is.)
In line with this, I suggest we make tag popups permanent while you're editing the question or, for 10k users, edit the tags (although less significant, since 10k users hopefully know a little better).
Currently, if you type fast enough, you never see the popup:
And after you press space after the tag, the popup disappears:
So it's fairly easy to type in a tag without ever seeing the popup, much less reading it.
I suggest, while editing the post, we always show all the tag 'popups'.
A quick draft:
Since we only allow 5 tags, it should be possible to fit all the excepts on one line without making it too long vertically. Perhaps, as part of this, we should consider lowering the maximum allowable length of tag excepts.