gas heated water

In the 60’s and 70’s we also had a gas heater for hot water, and that heater was definitely NOT suited for drinking water, as the pipes the water was heated in were copper.
The heat source is not the important thing, it’s how it’s designed and the materials used. It needs to be positively approved as food grade.

only my Scandinavia friends has it or talks about it

IDK why that is? But I’m Scandinavian too from Denmark, so there you go. 😋

my French and Italian friends usually don’t

AFAIK induction was under patent protection for a long time, and that patent was held by a French company. French stoves are nearly non existent here, it’s all local, German, Swedish, Italian, British or Spanish.

Maybe Induction was cheaper in the past in France and Italy? It only recently (about 10 years ago) became dirt cheap here, as in costing basically the same as the alternatives.
I remember back in the 80’s inductions was about 2-3 times as expensive as a quality stove that was not induction. So Halogen (the ones with red light) were dominant for many years. And also pretty good, but not quite as good as gas.

not how fast I can warm water.

It’s not a big issue, but coming from Halogen it clearly changes the way you use your stove, because it’s so much more powerful and responsive.
About how much faster it is, I had a debate with my brother in law who didn’t believe it could be that much faster than a kettle. I don’t remember the exact times it took, but the induction was as I mentioned more than twice as fast! That was a nerd thing because we are both a bit nerdy. 😋
I’m fine cooking on Gas, that’s what we used when I grew up, and when i moved to my own apartment, then for many years I used halogen, and now we have induction. IMO induction is superior, AND it’s also the most energy efficient.

So IMO the best reason to NOT switch to induction is if you have something else you are happy with, then the “if it works don’t fix it” may be the way to go for you.

One thing about gas that annoyed me though, was if you wanted to do something fast, and you turn it up, the flames spread wider, so if you wanted to boil a liter of water fast, or heat a stored meal, it was not very efficient at that.