[satanspastaroll]

I think most people over-estimate the need for availability anyway. It's tempting to build the very best you can, when in reality a business really needs a good-enough solution. A whole ton of software can be down every weekend if needed.

A great in-between is to simply have a backup server ready to go in a few minutes time. Super simple compared to orchestrated container system.

Of course for client projects that spec out a certain number of 9's must be done just so, but can also be billed accordingly.