First, not an expert, just armchair critic so take what I say with a large pinch of salt, but...
I think something US should take out of this is consider what Russia do with their monkey model strategy. Basically with something like tank/jet they do 2 models, one with all the bells and whistles and the other is a simple version.
This has 2 main uses;
1) Export market so they can sell simpler/cheaper and not share all tech. America does this somewhat but more on the tech protection side I believe.
2) Manufacturing output potential, so in a war countries win in the either the first strike or attrition. If you hit the attrition stage you want simplified options so factories can output faster vs the multiples the premium version take in time and resource.
If they had this, it might have given a low cost daily driver option while not forgoing the top end capability.
The other thing I thing Russia does I feel countries like mine (Australia) and other western nations should do more of is work out how to expand military into absorbing civilians. This way you can scale down the size generally whilst having solid plans on how to scale up quickly beyond the usual reserves. I've raised this before but people say military tech is too advanced. But I feel humans are smart and adaptable, I've little doubt if they look into this they would realise maybe women in their 60's (example/guess as far from normal military recruits) might make great radio operators with minimal training or drive supply lorries. Having this knowledge would give a huge force multiplier to armies if they want to scale fast and ideally help reduce the need for as large standing forces.