Its a good question all in all. I've rode for over a decade now and trials has never died. It always grows to be honest. Social media has in fact made it more noticeable but because each individual rider chooses their own social media platform, forums like this do go quiet but trials definitely isn't dead.
Its amazing that trials is so varied now. We still have a great street scene ( Inspired type riding ) and also there are a few guys still banging out some excellent TGS stuff (Adam Baxter etc). I don't see much natural stuff anymore I guess which is a shame but that was my favourite sort of riding so I would be biased.
Best thing about trials at the moment is everyone has settled into a section of the sport they are happy with....just cracking on doing their own thing.