There is a lot of industry that has absolutely no other way than to use gas. There was an article about a copper wires manufacturer in a German magazine a while ago. They need a lot of heat to melt the copper, and currently the only economically feasible way is natural gas. Electricity just can't get you the temperatures and alternatives like hydrogen just don't work yet (they actually have been running tests for years on this).

The issue is if they don't have gas, transitioning other things to electricity becomes difficult, because you need copper.