The author examined the distribution of instances in the fediverse. Given that many instances are hidden behind CDNs like Cloudflare or Fastly, the author employed ActivityPub’s functionality to discover the actual hosting locations of servers. More than half (51%) of the fediverse is hosted within a single hosting company. The author suggests that the fediverse hosted mostly with a few major providers, deviates from its initial objectives.
OVH server owners learned their lesson not to keep their backups on the same hosting provider after the fire a few years ago. The only problem I had was actually getting OVH to give me a new server to restore my off-site backup to!
If you have backups independently of your hosting provider AND your domain isn’t hosted with them. The worst they can do is take you down for the time it takes to get a new server elsewhere, restore your data and point your DNS (or CDN endpoint) to your new home.
If you’re running a fediverse server and at the bare minimum don’t have your database backed up somewhere, then the fault of any takedown is as much your fault as your hosting provider.
Mine is first backed up nightly to a server on another hosting provider, and that in turn is backed up to encrypted cloud backup.