Ah, ok, sorry i think i misunderstood your note because i fixated too much on the term "analytics". For what i will call "broadcast" events - such as your very

Ah, ok, sorry i think i misunderstood your note because i fixated too much on the term "analytics". For what i will call "broadcast" events - such as your very valid tsunami, earthquake examples - sure it would be essential for those alerts to get out...But whether you're using a centralized or a decentralized approach shouldn't matter - assuming of course that one of the nodes of the decentralized method gets the needed input about the alert - in order to pass it on to the other peers of the decent. network. Much like email and websites, and to some degree mobile phone carriers, having a decentralized network does not necessarily prevent fast distribution of important/up-to-the-minute/broadcast information such as alerts. In fact, one might argue that having a decentralized approach might help with overall resilience. That being said, as much as i am a proponent of decentralized (and open) social networks, they have many non-trivial obstacles to contend with...but i do hope for one day to not have to exclusively depend on closed and centralized platforms like twitter et al.