If your goal is to avoid downtime in case of nuclear war, you could use
a managed distributed database solution from a cloud provider.
Also, attacks against 'on-prem' services still scale, in the sense that
an exploit against a service's code can be used on any number of
independent deployments of that code.
The solution to that is to actively avoid monoculture. [0]
Also, attacks against 'on-prem' services still scale, in the sense that an exploit against a service's code can be used on any number of independent deployments of that code. The solution to that is to actively avoid monoculture. [0]
[0] https://indieweb.org/monoculture