that would be pretty cool but to have that, you need a high-network-latency solution, i.e., pretty much cold back-up. For some time I thought it's pretty last century option but having been experimenting for some time now, it's the option with lowest impact on system performance. More importantly, it's reasonably resilient.

Yeah, the myth that "just use aws" to have 99, 9999999 percent uptime is coming to an end...