https://news.ycombinator.com/

Oddly this doesn’t deter me at all, but I don’t buy mains connected components off aliexpress. Tons of DC stuff and I’ve never had an issue

I believe you can reply locally on your instance to dead communities, but that data would never be replicated to other instances. The fediverse isn’t really a mesh network, more like a hub and spoke on a per community level.