Using What to do with [bugs] questions now that version 9 is released? as a guideline Questions about bugs that have been fixed should have individual tags for each affected version. However this is impossible for longstanding bugs where there are many affected versions as a Question may only have five tags total, including bugs.
Although we might arbitrarily choose not to use tags for versions past a certain age this diminishes information and requires future maintenance. We might arbitrarily tag for only the last 2 affected versions but I think this will be confusing; for example under that scheme these examples:
bugs front-end graphics version-7 version-8
bugs front-end graphics version-8 version-9
would mean that the first bug was fixed in version 9 and the second was fixed in version 10, however both might be present in version 7. (Or earlier.)
How can we best address this?
[bugs] -[version*]finds non-version-tagged bugs.
Version-10.1. Is that what we want? (Not sure whether to post as a comment here, a new Q, an answer here...)