The cool thing about water is that evaporates all by itself. For free even. No electricity is required. So an alternative to making the tumble dryer "smarter" can be to simply not use it for most of the time, thereby cutting the loss caused by "dumb" dryers. The engineering part that's missing is related to re-introducing and improving the many awesome laundry line systems that used to be available.
I think I’ve seen the kinds of indoor drying lines you are perhaps referring to, but I don’t know how compatible they are with Northern Europe.