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.
Did you seriously think that was a realistic usecase? They provided an example, don’t focus on the details, they are irrelevant to the overall point about progress.