There’s a reason why they are centralised in the first place.

Decentralisation for big social media will just be a dream and the only thing which might have ground in reality is going to be interoperability which in itself is politicised. For instance, the boycott of threads by mastodon instances. nostr:note125u5ac8y9ttz7yjy7jpduythm3a3y57q6nwqng4dj027gvcp00yq28xfzf