I’ve read a few of these summaries now and I think Simon’s (as always) is best so I’ll link it here. This is just insane. Wow. If you’d described this to someone in 2016 it would have been dismissed as sci-fi.

I think it’s clear from this that uncontrolled, persistent and shared memory is a major risk - the message board pattern that repeats in this timeline and enables the coordination across sessions. Food for thought.