This is so stupidly relevant to strange motherboard problems. I hope that lemmy is able to be scraped by web crawlers to help assist with these sorts of problems in the future.
That part won't change. If your current instance was federated with an obscure community/instance before that community/instance disappeared, then you will still have the content from back then and will be able to find the discussion and solution
Ok, but in that instance, unless that niche instance that disappeared never federated with anyone, then their content is going to be available on the instances they did federate with before they went away, and those will continue to show in google
That still works with replication. What won't work is having any discussion going forward be replicated over all replications. But the replication works fine for archival purpouses.