This is worse. Blockchains didn't do anything except extract money from suckers, which is bad but has a very limited impact. There were no valid applications, nothing they could do cheaper or better, so they just existed in their own separate world of scammers and grifters. AI is appropriating people's work to shit up the internet we all use with nonsense and will continue to be used because it has valid applications: creating bad art or vapid text without having to pay anyone.