I can't speak for FpUser, but you misunderstand the idea of creating a single server: one does not just run one of them, they know about and expect multiple cop

I can't speak for FpUser, but you misunderstand the idea of creating a single server: one does not just run one of them, they know about and expect multiple copies of themselves to be running at different IP addresses, and they synchronize with one another, as well as maintain individual backups that additional background processes validate between different instances. Each and every one of your disaster scenarios is handled by the architecture. Each an every one of your disaster scenarios has happened and we've lived through them, as well as after the fact reviewed and optimized how we handled the events. As you are, we're professionals.