The open decentralized internet of the 2000s was one of the greatest common goods in human history. It makes me incredibly sad to see it destroyed so quickly. The niche blogs and forums that still exist are still incredibly useful when I stumble on one researching a niche topic, but I know their days are numbered with search traffic rapidly going to zero.

Maybe in the future something comparable will be invented and protected. No harm in dreaming a little I guess.

I don't think anything similar can exist in the future. The reason the internet was good for a while is because before 2005 and especially before 2000 mostly intelligent and relatively wealthy people had influence. Once everyone gets access quality just goes down.