Your Cupra does not have fog lights because they needed the space to add brake cooling ducts in to the front bumper.
The other Leons in the range still have fog lights - they just don't have the cornering function active
I'm guessing he is referring to other brands. If you look at the new Audi's now (A6, A7, etc.) and new Mercedes (C and E class) which are coming with LED headlights as standard, they have dropped fog lamps.
I think the reason they've dropped the cornering function on Leon's with LED headlights is more that the headlights should provide a wider and more even spread of light, so in theory, the cornering lights aren't required.