F-16V block 70 price isn't much lower than F-35A. Stealth is not a cost option if you want to win and survive against peer adversaries. In the long run, nobody is going to outmaneuver an AA missile with AI dogfighting software loaded into it.
Finally a reasonable response. The idea block 70/72 and most likely 21 are near the cost of an 35 speaks for itself. They are of nearly equal value in their offering. The 16 has a deflected intake option similar to the 35. Stealth coatings continue to evolve, but yes edges will remain. Simply use the best stealth composites in building the unbuilt 70/72-21s. The USG has 10 yr contract for FMS builds, just add some USAF builds.
After AESA, the DAS is the most important and it is proposed to be added to helicopters, therefore no great shakes for fitting on 70/72-21s or even 16 retrofits. Datalink upgrades are/should be standards anticipated. Likewise, counter-ballistic/hypersonic is a thing, so dual IRST (not stealthy) might be good option for 16s.
The F-35 cant even fly low enough w/ sufficient stores to accomplish CAS. A AFTI 16 would sure have more RCS but again (umpteenth time) low altitude BAI/CAS is the primary High Intensity Conflict mission.
Lots of craft are needed to accomplish these missions.. (w max # wing hardpoint) If an A-10 is not to be replaced, the plentiful 16s upgraded seems to be the only option
35 is great for STOVL for what is left of the new mini-Marine Corp but they aint contributing much .
F-35s have their place for SEAD/ stealth drone (where is the stealth loyal wingman? tube and wing ..not) mothership..but maybe so few (in the end) as too be somewhat boutique.