The grid where I live has a target of 89 minutes of unplanned power outages per year for urban customers and somewhere in the high 200s for long rural feeder lines. This is in Australia, where serving outlying customers comes with some geographical challenges. I think it's currently sitting at 99.998% reliability. I can't remember the last unplanned outage longer than a couple of minutes, although they did some planned work last year and took out our power for half an hour.

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.