Farmers change seeds all the time. One I know tells me that a great variety will terrible in 3 more years, though I'm not clear why. In any case they all are planting several varities ever year - four different ones in a field isn't uncommon - with harvest data to track the difference (different soils need different seeds). Test plots where they do many different side by side are somewhat common. they are always trying different options to see what works to do more. Plus predictions on weather mean different seeds.