IMO, GNS would benefit from a blockchain to store the root zone. Currently, It is managed by a non-profit. You can add your own TLD but good luck enabling everyone to resolve it without GNUnet e.V's say-so.
The problem is making a blockchain that's private enough.
I would go further. I would say that people should be allowed to make up their own mind without unjust interference (i.e. censorship (such as shadow-banning) and artificial manipulation of visibility (such as putting 'fact-checks' in prominent positions)) regardless of whether someone in a position of authority (whether elected into government, bought into the board of directors or shareholders of some company, or just has mod privileges for whatever reason) thinks it's true or not. The people decide for themselves what's true, not the powerful.
Tether is on record as censoring transactions (remember the Poly Network fiasco?). They are clearly centrally controlled despite being a token on the Ethereum network.
Whether they should have censored transactions in that instance is irrelevant. The fact remains that the coin does not belong to it's holders.
Everyone is on YouTube though. But thankfully, since I use NewPipe they can't make money off me. Then again, neither can the original creators but what can you do?
https://join-lemmy.org/
https://sr.ht/~vpzom/lotide/
https://getaether.net/
I think Freenet/Locutus contracts that work like forums on Aether (with auditable moderation and elections) would be neat.