Other things about comments: You don't need karma to comment on your own questions/answers (i.e. in reply to someone else's comment on what you posted). Basic

Other things about comments: You don't need karma to comment on your own questions/answers (i.e. in reply to someone else's comment on what you posted). Basically anyone can flag comments obsolete and this can make them be deleted without review. My last comment was "this code breaks for obscure input X" but I can no longer locate it. The real main problem with StackOverflow is that all the easy questions have already been asked and answered, and all the hard questions get little attention, so it's hard to get karma honestly. Many people have luck operating in obscure language tags.