To me, at least, there seems to be a dearth of high quality on-point trading discussion for the past few years. And when there is a really good thread going with multiple members exchanging quality trade-craft information - it seems to get constantly sniped at and eventually derailed by crackpots and trolls. My sense (reinforced by my own client feedback) is that serious active trading Members with worthwhile professional trading experience just seem to get overwhelmed by the unregulated noise and worn down to the point of exasperation.
There's no doubt that the professional trading community has contracted in size, but on the other hand I don't think that the number of successful traders has necessarily dropped off the face of the earth per se either - they choose not to participate here, or they participate on another forum where the trading discussion is more focused on quality trading craft content and crackpots are simply not tolerated. I've had a number of members from that other forum hire me, and they tell me that they won't post over there unless they have something relevant and trade-craft oriented. It's a mindset that is reinforced by that website's management.
I am a longtime sponsor on ET, and I peruse the forums several times per week. I like ET and I am a big fan of Baron and the principles this website as founded on. But there is no doubt in my mind that there's not much worthwhile trade-craft related material being posted the past few years - to put it another way, my visits to the ET forums are typically a brief perusal these days.
I'll illustrate my point another way - I've had almost 200 clients with serious trading backgrounds hire me for my consulting services since 2008, and I can count on one hand the number who actively posted on ET before they hired me. I've asked why and the answer is discouraging.
Ask one of the few really well respected posters how many people are following him versus how many of those followers actually post material. It's not an encouraging ratio.
Just my 2 cents.