not quite the same as whatsapp, you're isolated. you dont need your friends to move, it's something you can do on your own.
"reports" that i'd read said that fidelity were getting something like 600% increase in signups (who knows if thats because of this movement or because people hate RH).
Very true. But on the other hand, it ties up your investments for several days.
Moving means totally removing yourself from the market precisely at the time when big swings are happening, which many people might not want to risk. So it's actually pretty tricky, not frictionless or anything.