I use all 4 burners at the same time at least every week, if not more often.
You must not cook very much.
It's not hard: boil water for pasta, potatoes, make a soup, and then cook a protein, and bake a cake. That's not a complicated meal - you could do than on any random day.
> which mostly heats the air instead
That isn't actually true, which you can tell for yourself by simply putting your hand near a fire, and a fire with a pot on it.
So therefor, it's fine if you now have a stove that can only heat 2 burners at once.
Why have the other burners at all? We could save so much space if we just had 2 burner stoves and no ovens since I never bake either. I do use the oven occasionally but occasionally is not enough excuse to have it I guess. Obviously no one even needs a stove at all, that's what restarants and grubhub are for right?
induction stoves are far more efficient in terms of heat transferred to food vs gas, which mostly heats the air instead
and yeah it's a bummer the one time every 2 years you go to use all 4 burners at once you won't be able to max amp it