Gyros in planes? Seem to me the cheaper the gadgets get the more people use them. It's all up to the skills of individual pilot. I know of a bloke fitting 2 gyros on Ails. in 20+ grand model and was lucky to bring it back after only one circuit.
I fly at least 20 jets of every kind and use "20 year old Piezzo" gyro only in one turbine powered delta with no Rudders, hooked on the nose gear to help steering it strait while taking off.