If something like Nostr.com can exist for decentralized social media network, and it keep growing despite everything, than I am sure that we could have something similar to work as decentralized forum.
Question is how many people are interested in using forums these days.
In reality there are only a few people holding the coin (any coin - even Bitcoin) who actually care about consensus, community, voting, governance, etc.
True, but there are a lot more bitcoiners who care about real value and decentralized, than there are altcoiners who are doing the same thing.
And big difference is that bitcoin was no premined, there was no pre-sale of coins, and there is no hidden team and owner behind.