I sure hope that more and more areas on the greater web keep getting decentralized/federated...because all this centralization is for the birds! Over the years, any content that i have posted on such centralized platforms, i consider ephemeral...and if its lost, either i already have my own copy, or i don't care (it would be content that i care less about, etc.). Of course i say that, but really it would be others that might suffer from, say, some essential answer that i provided like on stackoverflow, and then when that answer is gone, i will be ok, but others will suffer. I'm by no means a fountain of answers, i'm just proposing an example scenario. To tangent a bit, this is why the intent of projects like SOLID [0] sounded so good to me: everyone has their own somewhat copy of interactions with each other, ensuring tha at least to some degree there is preservation of valuable content among members of a community.

[0] = https://solidproject.org/