It's buggy, but I'm managing. Weird things like having to press the "Subscribe" button twice. I'm assuming most will be solved when traffic stabilizes.
The federation is.. strange. Confusing when I click a link to another instance when trying to subscribe to a community, but also kinda cool how it works. I'm not sure federation should really be a concern for users, but time will tell. I'm sure it will only improve.
Long ago the saying was "be careful - anything you post on the internet is forever". Well, time has certainly proven that to be false.
There's things like /r/datahoarder (not sure if they have a new community here) that run their own petabyte storage archiving projects, some people are doing their part.