Think about it; instead of those in charge or the instances deciding who they don’t want to be federated with and thus restricting content for the users, it would be better if users were able to block entire instances instead.
We’d be able to curate our own browsing experience so much better without admin/mod drama influencing the rest of us.
Edit: Alright so maybe not exactly replace defederation, but it should still be an option available to us, and in general should become the default action before defederation IMHO.
I think smart-clients are doing this where one feed on a client can even come from multiple accounts on different servers. Isn’t that kind of how RSS readers did their browsing, blending multiple sources?
There’s been so many tools to move profiles around between servers, is is basically multi-reddit by server-login