How to create a decentralized kind of wiki?

I keep feeling frustrated as valuable knowledge for my different hobbies over the last years became siloed away in corporate social media. I believe wikis could be a way out, but can we have decentralized, federated wiki software that can kind of talk among each other?

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What does the 'blockchain' component do? Not sure what it means compared with a regular platform.

Im no crypto expert, but i think it just means its decentralised so that if things are changed everyone know, theres no way to stop it. I think this is good to read: https://www.synopsys.com/glossary/what-is-blockchain.html#:~:text=A%20blockchain%20is%20a%20decentralized,the%20consensus%20of%20the%20network. So i think it'd be how wikis work now, just that nothing can be omitted. (Again not a crypto expert, so i might be wrong, but i cant see anything else itd be useful for a wiki)