I wouldn't say they're common, but I see plenty of at-home generators (Generac is popular, there are others) here in the Northeast USA. We have lots of old trees, and lots of snow, which maybe you share, but I guess it's our propensity to ignore infrastructure maintenance that leads to more, longer power outages.
In the last ~12 months, I've thrice lost power for more than four hours. Once you start losing a fridge's worth of groceries every 4 months, amongst the other challenges with power outages, the at-home generators start to look attractive.