When we flag/vote-to-close a question as a duplicate on Stack Overflow, and that potential duplicate doesn't have any upvoted or accepted answers, we are alerted that we can't use that question as a duplicate and can't continue. This same check does however not seem to apply to Meta questions. Why not?
Bug reports/support questions/feature requests don't have to be answered to be duplicates. Unlike the main site, where multiple questions being open might help at least one of them find answers (I still don't really like that you can't close them, but whatever), on Meta sites often feature requests/bug reports might not have an answer yet, but they're clearly a duplicate. And sometimes features/bugs get fixed/implemented without an answer. It'd really slow down the system on Meta if we could only close questions of answered questions, especially as Rachel notes: every time a major bug happens we usually get 3+ meta bug reports about it within minutes.