I've never lived anywhere where the power didn't go down for at least a few (cumulative) days a year.
Since then, none of the extended Portsmouth conurbation, Sheffield, Cambridge, rural Cambridgeshire or Berlin have had any problems big enough to even notice while I've lived in them.
I have seen at least two circuit breakers trip in that time though.
In the UK, I think I can remember 3 power outages my entire life. One when there was significant flooding in my hometown as a child, which lasted around a day, once at university for a few hours (local substation failed) and recently 30 minutes overnight while they were upgrading something (with a lot of notice). I may be undercounting/misremembering but I don't think its far off.
I think the main difference is the UK in all but mostly rural areas has all the power lines underground. This is very different in eg North America where you can go a few blocks out of downtown areas and it is all overhead delivery.
I'm surprised that someone would think days of power outages are normal everywhere. My family used to get hit with 8+ hour outages every few years back in the 90s because we were at the end of a single long rural feeder line, and we thought that was an unacceptable frequency.
PS I don't live in the US.
What city do you live in?
The cause around here is usually storm + trees + above ground power lines, plus a low enough population density that you're not top priority for the utility company.