I lived in Shanghai and Shenzhen, and I think it was mostly indicative of how new the building was. Anything built after ~2000 usually had the option of plumbed gas or electric, but in older buildings I saw a lot of those standalone bottled gas hobs with the purpose-built alcove in the kitchen.
In Hong Kong, it was really down to personal preference. My first apartment came with a normal resistive stove that the landlord swapped to an induction cooktop at my request, and that building (on HK island) didn't even have plumbed gas. It'd been disconnected during a renovation years before I moved in.
> But they are far from ubiquitous and common in the country overall, of that I can assure you.
I actually agree with you here, I was just making a point about the precariousness of using personal anecdata to support a position as broad as "people in China rarely have electric stoves." In a country that big, even the outliers make for an enormous group.