That's pretty much the definition of a trend. It's short-term popular and big and everybody buys it as if it is the greatest thing…then after a while the lack of substance hits hard and falls into obscurity, like a hangover after a drunk party.
That's why roughly 98% of memes are forgotten sometimes just months after they were hot, they were just that, a tendency, not something that hold up for long.
Some of them can resist, but again the time only helds up what had a great substance from the get go. Not a lot of things age like fine wine.