Boeing, Lockheed Martin, and Northrup Grumman are going to develop an advanced engine? No way in hell. Who are they going to partner with? Rolls Royce? Asea Brown Boveri?
Tesla 😎
It’s not about actually developing something, its about getting the money to develop something.
All three make/subcontract stealth inlets/exhaust airframe components. that neither Pratt nor GE make.
The Stealth stuff is where they come in.
If you ever happen to work in aviation and get a chance to see the RR engine factory is amazing. Especially amazing is how they make the vanes on the impellor / compressor blades on their jets engines.