You load the machine say in the afternoon/evening after work etc, and then it decides based on historical data that 02:35 is the local minima and starts. You run the quick 1-hour program because it's Good Enough(tm), then the laundry lies wet in the machine from 03:45 until you wake up around 06:00 to start your day hanging it? In my experience, but perhaps this is just local circumstance (climate etc) you can't leave damp laundry in the machine for hours on end, it will get smelly and need to be re-washed.

Also, not being able to plan when you deal with the wet laundry because of the power price hunting feature sounds super annoying and stressful. Perhaps there's an assumption that after the laundry it will also tumble dry; we rarely do that due to it being bad for the clothes and costly in energy etc.