I wouldn't call decentralization a hair-shirt. I mean, I take your point; it makes certain things more difficult to implement. But it's a tradeoff, not a pointl

I wouldn't call decentralization a hair-shirt. I mean, I take your point; it makes certain things more difficult to implement. But it's a tradeoff, not a pointless sacrifice. There are huge advantages. The most obvious one to me is "keep your personal identifier when you change providers". Just like email.