In 1997, I lived in a development with public water and natural gas service. Had a storm that knocked out power for about a week over a large region. Still had running/hot water though; had a small 5,000 watt generator for lights and refrigerator. Was during the summer, so didn’t need heat.
Moved to the country in 2001. No public utilities except for electric. If the power went out, it would be like a log cabin - no running water, no heat (house has no fireplace). That’s the primary reason for going all in on a whole house generator, especially if it happened in the winter.
Surprisingly, since I had it installed about 20 years ago, the longest outage we’ve had was maybe 8 hours during a summer day. Still feel that it was a good investment though; peace of mind.