If someone asked a question about abortion while Roe v. Wade was in effect, and then-accurate Roe-based answers were posted, should new Dobbs-based answers be posted?
If relevant, Yes. Any such answer should make clear that it is applying the new decision, and that it only applies to the law subsequent to that decision. In general, I think we should answer what the law is currently, and then optionally updating the set of answers provided when the law changes, if anyone thinks it worthwhile. Of course questions abut what the law was at a particular time in history need not be updated.
To be clear, I am thinking primarily about adding new answers to an existing question, rather than updating existing answers, particularly not updating answers initially given by others. Correcting typing, spelling and formatting errors is one thing, but we do not normally change the sense of answers given by others. Of course, if a user who previously gave an answer wants to update it, that is fine, but no one should feel compelled to do so. I add this paragraph in response to comments by Iñaki Viggers