Russian Air Force Colonel says US should follow their pattern to maintain air superiority.

via Sputnik.

US planners need to shift focus from giant leaps in fighting capabilities to small but continuous upgrades if the United States is to remain the world’s strongest air power, a US Air Force study stated on Friday.
"In the past, the Air Force has pushed for ‘generational’ technological advances equivalent to the transition from flip phones to smartphones," Air Superiority 2030 chief Col. Alexus Grynkewich said in a statement describing the study’s conclusions.

"It should instead be pursuing incremental advances like the upgrades provided by newer and newer versions of smart phones and continuing to upgrade along the way instead of waiting for a revolutionary jump in technology," Grynkewich noted.

Read the entire article but you can bet that Russia, China, our allies and many others are doing a deep dig on the F-35, US air superiority and if the gap isn't closing with potential enemies.

We'll never see an honest appraisal in the public sphere but I'd bet the outlook is at best gloomy.