If everyone is using just 3 relays it’s not that trivial to switch relays.
Why would you connect to a new relay if nobody is posting there?
Why post there if nobody is listening to it?
If everyone is using just 3 relays it’s not that trivial to switch relays.
Why would you connect to a new relay if nobody is posting there?
Why post there if nobody is listening to it?
If it's just 3 relays, then yeah we're in trouble. If it's about 20 relays with most of the traffic, and a few hundred around them, then it's probably alright.
There's also no real reason users couldn't hold maybe a few hundred megs of their own event history, post that to relays in case. Plenty of ways to deal with this kinda thing.