I'm not saying SW has gone downhill, but...

It's hard to tell because it goes through not just daily and weekly cycles of greater or less activity, but also seasonal and annual.
Lately I've had the feeling that there've been fewer of the old personalities around, long time member drop in less often and some have just disappeared altogether. At the same time, quite a few newbies have appeared, but haven't hung around for very long. So it does seem to me as if it's falling off - less activity and less variety.
Once it reaches a tipping point it could lose its momentum and fizzle out - not due to the dysfunctionality of EP days - but due to the members themselves not engaging enough in strings of conversations.