Even though some gas appliances (like ovens and heaters) don't work without electricity, I think stoves and gas fireplaces could be really helpful in life or death situations such as extended power outages caused by "the big one". On the other hand I suppose gas lines are one more thing that can be damaged, so there's a tradeoff there.
I actually know some people in outage prone areas who have invested in natural gas generators. Much cheaper than a Tesla battery pack and similar storage solutions
For the less fortunate, if you don't own a single spark source to light a gas fire in your house it's highly likely you have far greater immediate survival issues to face.
This doesn’t apply to gas fireplaces or smaller room sized radiant gas heater though.
Most of our power outages is related to obsolete and un-maintained power-grid being fragile to high loads and wind.