Should I keep my comments or remove them if they are wrong or no longer serve a purpose under an answer/question?
When I remove my comment(s), the other comments (by others) become meaningless. If those comments are also removed, it looks cleaner to me. If not, it feels awkward to ask to remove them.
Sure you can remove them. If you feel other comments are left in an awkward state, then feel free to flag them as obsolete. That way a moderator will review them and remove them if deemed appropriate.
There is also a SE meta post about flagging whole comment conversations, which you may find relevant.
Yes, yes, yes. Not only can you decide to remove your own comments that are incorrect or no longer relevant, I strongly advocate that volunteers SHOULD ALWAYS remove their comments that are incorrect or no longer relevant.
By removing yours, you enable the removal of the "response" comments that trail it. This is always a good thing.
This logic goes applies to other volunteers' comments.
Always consider that every comment is as valuable as toilet paper -- to be disposed of, without a trace, as soon as it has served its purpose.
This bleeds through to other page-bloating comments like "thanks" and "+1" and "you are a God-like genius" and even worse commented solutions that disturb researcher focal points and defy StackExchange design.
All of these comments (and more which do not improve content) should be swiftly removed/flagged with extreme prejudice.
In fact, when you can edit a question or answer by including useful comments (and reference the commenter of course) in the post itself, then the comment can be removed and everybody wins.
In a utopian page, there are no comments. This is Q & A not Q & A & C. Let complete and comprehensive questions and answers do their thing. Beautiful.
