Personally, I think some rich people will likely go the solar+batteries route just because it requires less work overall after it is installed or provides peace

Personally, I think some rich people will likely go the solar+batteries route just because it requires less work overall after it is installed or provides peace of mind. Maintaining and refueling a generator isn't hard, but it is still one more thing to worry about. If the outages go on long enough, I predict the cost of solar+batteries will come down because enough rich people buy them and more and more people will be able to afford them.