That is the point! "A" could have expected to need to make their next move in 4 days time (maximum) if "B" had taken their 2 days to make their move and then there would be another 2 days after that for "A" to respond. Presently, if I play a two day game, make my move NOW then I have to wait up to 2 days before I know the time and date by which I MUST make my next move ... it could be a minimum of 2 days but could also be up to 4 days. This proposal takes away that uncertainty.