Gas is cheap because you're externalizing costs, and have the government subsidizing it.

The electric stuff works if you provide electricity to it. That doesn't have to be grid elecetricity

You forgot one small thing, there's two orders of magnitude more emissions with gas plants which makes this technology unsuitable for any future development, it's basically legacy, regardless of what you think of nuclear.

> How is an all-electric infrastructure “less fragile”?

I can generate electricity at home with off the shelf parts. I can also store respectable amounts of it with stuff I can buy off the shelf.

Electricity generation can also be distributed easily, you can have multiple small power plants around the grid.

Gas needs to be centrally pumped out of the ground, processed, pressurised and fed into pipes. There is no practical way for a normal home to make enough of it at home.

Gas is cheap except when it isn’t. If you are a European depending on cheap natural gas from Russia, well, a simple war with Ukraine could be enough to shut you off.