Virtually all dishwashers nowadays do not have exposed elements so any that have heated drying the air comes in via vents. residual drying while not as effective is cheaper to run so has more green credentials. It’s well known that plastics inhibit the drying process so avoid putting too many of these in if you can.
Bosch dishwashers are still my favourite, ours is 10 years old and still goes wee. Series 4 and up are the best and some even have extra dry option.
Don