Best Forum to hear experienced audiophiles exchange thoughts?

There isn't a good one.

Some of the technical threads on PS Audio’s Forum are interesting. Avoiding threads with disappearing OPs seems like good advice.

Audio Aficionado is a good site. No trolls or politics allowed.

I’ve been a member in this site for many yrs ,  this site long time ago allows arguments connected to topics, respect is still there,  this is the time when Albertporter , Jadem6, Swampwaler. Sean, Today some members they don’t answe r the thread and the question correctly, because they always stir it to the gear they own. And when they don’t like the opinion of others? They easily get offended. For me Audiogon is still better than others.

If you have more focused interest in Audio you can also join Facebook groups for them. I'm a member of several including Luxman and Magnepan. Just do a search on groups.