Gas is expensive to transport. The United States has a lot of gas and a lot of transport infrastructure. As a result, gas is cheap.
The same is not true on continental Europe.
I moved to Finland, here gas is an oddity, and not so common at all. I really miss the speed of a gas-based hob.
Bit of a stretch to reframe limited compatibility as a 'bonus', dontcha think? Outside of induction hobs, the norm is for any pot/pan to work on any stove.
As far as the second... yes and no. IIRC, some of the reason for the decrease in enamel cookware was that it couldn't be used on some burners. The same goes with glass saucepans: I don't think you are supposed to use them with gas cook tops - even though these were popular for some time. Making sure the material was suitable for your cooking surface has been a concern for quite some time. It just happens that most cookware can be used on most surfaces.
The induction hob is certainly better than the electric rings we had in the past, but I still miss the gas!
In the 80s oil and gas prices plummeted in the US, but electrical power prices did not, and it then became cheaper for gas and oil.
The proliferation of gas in the United States is also probably due to less-regulated environment. Gas companies are profitable and expanded their networks and distribution to expand. I would guess fewer environmental regulations and building regulations make it easier to expand a than in other countries.