Most of our talk is trivial. To talk as if the quality of it has been ruptured by newcomers in my opinion is nonsense. Discourse on the other hand implies some reason and is applied with a sense of perspective -where things are measured or weighed. In the weighing, some scales seem to be calibrated much better than others - I read just about everything that R.Rich and Lori write (among others for example), because they just have great football acumen that is calibrated by a sense of an historical and even a market value (when it comes to the business of football.)
Beyond that we have a slew of ideologues - and if it is politics or football or manliness or God - very little ruptures the approach. Being robustly ideological is not necessarily a bad thing - but it can be limiting- no need to pound down those who disagree, you just need to say hey X is X in my world and that's about all I can offer.
We do have those with specific expertise however. That's the best part. Whether it is personal experience, economics, tech, or 60's sitcoms. That much is fun.
Most of all I come here because it is a big sandbox and I have a sense of play.
We can be serious about the castle we're creating for a bit, but it is mostly sand in the end, and
the world is mostly indifferent to it, and no matter how much it may interest us and whatever mess we may make of it, it is there to start again tomorrow.