The F35 is the most in demand military plane in the world for the price. They spent 20 years iterating on it and its now the best plane for the cost with its capabilities.
The future isn't in pilot-in-seat aircraft at all.
Hence recent projects like X-BAT and YFQ-44A. Sure, YFQ-44A says the mission now is to support crewed fighters, but I don't expect that to last.