Some people use it to maintain contact with long distance friends and family. Especially in scenarios where other methods are prohibited by time zone and expense. It’s also been used by whistleblowers to expose government corruption and illegal corporate machinations.
Just because it’s primary use case has been altered to favor brainrot and slop doesn’t mean it totally lacks value or usability for other uses.
I don’t know what - if anything- comes after. But I do like the Buddhist analogy of death being like a wave falling back into the sea. The wave is gone but the matter and energy that constituted it survives and are eventually repurposed for the formation of another wave. Or a bird, or a tree, or some other part of the natural world.