Good morning, Wayne;
Yes, I have also looked at the current Sony lens catalog. (Boy, what a change. We have come a long way from the Trinitron.) Just the physical form of the catalog is impressive. There is one by Canon that is equally impressive. Right in there with the ones published by Leitz/Leica.
Anyway, yes, the prime lens technology is quite mature. The impressive advances have been in the zoom lenses. Now they are able to get performance very similar to prime lenses in the lens resolution. At least, with a good zoom, it is getting hard to tell by looking at the negative that it was not taken with a prime focal length lens. Again, a lot of this is the result of being able to alter a parameter and crunch the numbers in an optical formula on a computer to see what you get. Like so many things today, it seems that you need to be a good computer tech with a flair for mechanics, or optics, or microwave radio, or . . .
Enjoy; Ralph Javins