The ones we have are regenerated using the microwave - a lot more energy efficient!

Condensation is invisible moisture held in suspension in warmer air condensing when it hits a colder surface. The structure of a car can get very cold in winter and the air inside the car is generally warmer either by occupation or just general warmth during the day. Unlike a caravan, cars tend to be fairly well sealed from the outside environment so they don't have constant air changes. A caravan's fixed ventilation ensures the air is constantly being moved in and out, in an unused car it's inert.
So put a bag of relevant stuff in a car and it'll soak up the moisture inside which isn't replaced by moisture from outside, therefore there's little moisture to form condensation. In a caravan the moisture would be soaked up but is immediately replaced by the ventilation allowing more moist air in to bring the inside into balance with outside.
It was Ford who had a 10 year exclusive on electrically heated windscreens that ended a good few years ago and they're now fitted/available for many marques. Having said that I've had electrically heated screens on two Ford products in the past and they failed to impress in removing both snow/ice and condensation.

Of course normal car heaters/demisters rely on the cooling water in the engine warming up before they can become effective and the time that takes can vary from model to model. Which leads me to ponder if there's a positive to BEV's in that their heating is presumably available immediately and whilst using precious battery capacity, should clear screens much more quickly than ICE vehicles.

And RF is radio frequency or Randa Francoiserie

Pistols at dawn Gentlemen ?

Too many TLAs chaps!😎

I even had to look that up 🤣

I did too I-G and JGr