The title seemed quite negative but the article is quite good.
I hope that POSSE is the future but the layperson will not host their own site that serves as their "identity" which makes me feel that at some point we will have "identity management" services which will again centralize part of the web (in a less worse way)
I can see it happening if it becomes an "appliance", similar market to what the home assistant green doodad is going for. "put this shiny blue cube full of hard drives into your kitchen, and join the identiverse! it also comes in purple!"