It all started back in late 2016 (guess why), I'd say that by 2018-2019 the momentum was already strong enough for the general population to also get hold of it

It all started back in late 2016 (guess why), I'd say that by 2018-2019 the momentum was already strong enough for the general population to also get hold of it. It all culminated in the summer or 2020 (for the Anglo- and Anglo-influenced world, at least), but, hopefully, I'd say that right now we're in the middle of a vibe shift. Evidence number one is the launch of Threads itself, which feels like the launch of a dead carcass out in the sea. All this to say that the OP is correct, social media is dead.