Decentralization also includes federation, where you have dispersed, but individually independent servers cooperating to serve an application. The ActivityPub

Decentralization also includes federation, where you have dispersed, but individually independent servers cooperating to serve an application. The ActivityPub specification is an example. Mastodon is based on this, and Pleroma. Because it is spec-based there are less walled gardens / vendor lock-in. With your Mastodon account, for instance you can comment on PeerTube (federated YouTube alternative) videos. There are discussions and project on creating e.g. Medium, Reddit, etc. alternatives. I guess SlashDot functionality is also very possible to recreate in federated fashion.