None of these technologies will disrupt big tech. They're niche things that, while awesome, appeal to techies and people being censored. To stop conglomeration of big tech, you need big tech businesses that refuse to or are not allowed to merge with Google, Facebook, etc. Legislation around this is interesting because these are not technically anti competitive monopolies, and you don't want to overly restrict the market by accident.
This is a neat summary of decentralized tech, but the opening paragraph is a red herring.
This is a neat summary of decentralized tech, but the opening paragraph is a red herring.