Yeah, you never know, and generally speaking, discussions now are not what they used to be ten or even fewer years ago, let alone twenty years. You used to ask a question about some tube or cable and there would be many posts and opinions.
I guess some newcomers aren't aware of how to search past threads, so they end up asking questions that have already been posed many times over. Perhaps this has the effect of causing some long-time participants to lose interest?
To state the obvious, it's only natural that all posts won't be relevant for everyone. For example, I don't have a dedicated room, so posts that flatly assert that attempting to improve sonics without treating the room are a waste of time and energy aren't very useful to me. And the fact that I haven't found this assertion to be true doesn't make such posts any more relevant.
Over time, I've compiled a list of guys who I've found to be knowledgeable, patient and happy to offer suggestions. At this point, I'm more inclined to PM them, directly if I'm trying to solve a particular problem.