> i also had in past machines from 5 different manufacturers. none of them had mechanisms that facilitate 2 releases or pre-wash compartments

did you check the manual? I think in a previous video he mentioned that for machines like that it was stated in manual to add powder for prewash directly in the machine.

they all washed dishes just fine without any prewash powder added. somebody "here" even quoted bosch manual that there is no need in prewash powder. i most of the time use cycle that doesn't even has prewash