In a newly built Modern neighborhood the houses are all built to the same basic “set of standards”, that includes an ups or a battery with the solar installation.

A lot of people who say they are “techy” aren’t actually all that techy, they just have a laptop with a server and Linux. It’s pretty dang common to have ups or battery’s when actual modern tech is installed in a house.

Even infills in older neighbourhoods are frequent enough that there should be plenty.

Or try living in the suburbs where you gotta get gas trucked in, you’re gonna want backups.