I think sovereignty is gradual, not binary.

Same as it happens on the internet. You don't need to run your own email server. What's important is that you can.

If Gmail had been like Proton Mail from the beginning, Proton Mail wouldn't exist and there would be less self hosted servers.

Enshittification in centralized systems is necessary and has a severe negative impact (e.g., democratic systems). But in open protocols, such as the internet, closing the doors to Twitter/X just results in Nostr getting more popular.

So even without an exahash you can get transactions through easily. And centralization and censorship from large pools just push Bitcoiners to create better pools (braiins, ocean) and get some more hashrate.