You're saying the underlying platform somehow has some bearing on the quality of the users and the content? Don't get me wrong, I agree phpBB is outdated but well-established, long-running forums are a goldmine of information.
No. That's not at all what I'm saying (as is obvious from my further replies). The content is useless unless you can find it.
Edit: actually, it CAN have a lot of influence on the quality of the content. Ever found a phpBB thread with dead images because the user hotlinked them? Discourse downloads them and replaces the urls with the locally cached ones, ensuring the images are there in five years. That's just one example.
