I'm so tired of developers that don't bother to read the text they are responding to and immediately assume that the other party in the conversation does not know what they are talking about.

Or developers that used to work with something long time ago and never revisited their knowledge.

Or participants in the conversation which have strange, inappropriate and unrealistic expectations pitted against .NET but not any other technology, which would go out of their way to post something that is factually incorrect, simply out of desire to be controversial (I can shit on Go all day, but I'm not going to lie about its pros and cons).