[jeroenhd]

Reading the comments, I learned that OpenID is not centralised but rather provides federation support. I wish I'd known about this sooner before it died, because it would've been fun to try and use.

I'm sure decentralized authentication won't come on commercial platforms though. Maybe some developer-centric services will add support once the Next Big Thing in authentication and authorization comes along, but companies want to keep as much of their account system under their control as possible. It might be because of data mining, it might be because of bot prevention, it might be because of fear of trusting external providers, but I just don't see any reason why companies would accept such an authentication system.

The closest thing I can see happening is a federated authentication platform like the EU is implementing with EIDAS. Authentication with your home government for EU-wide services, tied to your ID card. I don't think something like that will be implemented for much more than government institutions and banking, despite the idea having been proven to work.

Simply put, as long as it doesn't make business sense to trust another provider, businesses won't offer any decentralized authentication methods.