I imagine Yamaha makes a huge profit margin on a 61 key board seeing the sheer numbers of them they sell. They probably do a huge production run and crank them out by the thousands which keeps their costs down. Why would they want to make a 76 note model that would just need a limited production run? How much more would that 76 nite board cost? How much more would you be willing to pay? I think they just stick with the tried and true! -charley