I will always advocate the people leave those platforms and go to other instances. I don’t know why everybody moved over to Lemmy.world when people left reddit. I assume it must have been heavily promoted over there although I never saw it.

Been on a smaller instance has only upside, it’s far less likely to go completely insane and then get itself defederated from other instances, it does not tend to get DDoS attacks as much, and you can still access all the content on those larger instances, assuming you want to.