Regardless of that, higher end modern gas stoves won't allow you to use the stovetop during a power outage anyway even if you match light them, because they have electronic flame presence sensors for safety. And no modern gas range or gas oven with electronic oven controls will allow you to use the oven without power.

A couple days a year typically, between hurricanes, tornadoes and winter ice storms.

Every month or so. Every two if I'm lucky

Once a year maybe? Almost always due to storm damage.

We had maybe one in the past 12 years where I live. A lot of people around me have had more, but my house specifically hasn't had a major one that I can recall. We've been thinking about switching away from gas stove eventually.

One long enough to be worth considering in the last 7 years.

the question might be more properly phrased as:

what is better, using electricity + backup power generator, or using gas stove in the first place?

I've had one in the past 2 years.