A domain takedown was never able to shut a server down, not even with centralized servers. Most big services are accessible via multiple domains of different countries, and this would just disable one of them. But for the Fediverse that means that they also “disabled” an entire instance with all its users.

This actually shows us that relying on domains can be a problem for the Fediverse! Imo we need to upgrade the federation protocol to be able to handle these things, like propagating a domain change or migrating accounts to other instances.