Please don’t hijack the term decentralization to solely mean blockchain &co. What you are describing is a single system that uses technical means to decentralize (quite cleverly so).

The classical D. is achieved by not having a single system like Blockchain but instead having as many as you wish - anyone can install nginx on their server. This results in a multitude of systems achieved through policy means. The spec means decentralization in this way - Sweden can rely on some DID methods, UK on other, and you can use Bitcoin :)

You may argue that the latter is flawed but please don’t make it sound like the former is the only way.