At one point, a long time ago, USNTPS decided to reject all propellor powered aircraft; similar Navy-wide dictum requiring two engine aircraft.
Ill-considered judgment dumped the T28, piston engine, then realised the loss of a unique spinning aircraft and 'torque' during takeoff. Beaver and Otter retained, as were guest appearances in P3, Mohawk, and Bronco.
Times change:-
https://www.navair.navy.mil/nawcad/usntps