Thumpalumpacus
Major
It's not all about shape. There is a lot more to it. I know stealth technology was known, but the stuff learned from the early projects you describe is what lead to the 22.
An F-22/F-35 by anyone in the world was not going to happen in 1980-1985.
Right, the materials tech simply wasn't there -- never mind the data-processing the modern jets use as a massive force-multiplier.
Fun fact: Pa Thump, after we got back from Iran, took on a job mating the radar version of the Maverick AGM to multiple airframes, usually working on the test range at Ft Hunter-Liggett and other bases in the area. In 1981 this included a two-month stint at Tonopah NV mating it to the earliest F-117s. Of course he didn't say anything at the time, but after I'd enlisted and learned a little I asked him about it, and got no answer ... which is the right answer.