I'm not sure there's any discussion anywhere anymore. It seems to be the nature of the beast, this internets thing. Ok, that's a gross exaggeration, but you can see what I'm driving at. There's plenty here that I don't get into (including some of the aforementioned gig reviews) but that's because I can't, in those cases. If I had something to say, I'd say it.
Of course a fair chunk of music discussion in this forum now isn't music discussion at all, it's who-got-what-ticket-to-what-festival-or-ordered-whatever-deluxe-edition-on-amazon discussion. As a non-concert-goer, again, not much I can add. But at all times, I am lurking ready to pounce.