What is annoying is the opinion (not yours) expressed that older optics better meeting a photographer's individual requirements indicates that the industry's design capabilities have somehow regressed or lost knowledge. That's a frightfully ignorant viewpoint.
There's another side to that comment because there may not actually be modern lenses available to fit one's chosen camera(s). I have no doubts that the best modern lenses are better than the best lenses available in say the 1970s particularly normal - wider angle zooms.
So in my case using screw mount and K (manual focus) mount Pentax cameras there isn't. Yes there were some recent Zeiss prime lenses sold at very high premium prices but really to expensive for older cameras.
One of the goals of the industry in recent years has been to produce lower cost zooms for Digital cameras, some like the Canon EF-S 18-55mm zoom are excellent lenses in terms of image quality but frustratingly slow f3.5 -f5.6 and build quality is not high, mine lasted a few days longer than the 1 year warranty. A down side is I couldn't use it on my Canon EOS film body which I bought new for £10 ($14)
To many we are Luddites because we still use film often preferring manual focus cameras, the bottom line is the quality of the final images. while this post is in the 35mm forum I'd just comment that I've been using MF & LF lenses made over a period of just over 60 years, you can't tell that from the prints in my exhibition sets, They lenses include a 1940 Dagor, 1953/4 CZJ T Tessar, Schneider Angulon and Super Angulons (coated but not MC) 1960's to early 70's, MC Sironr, Symmars and Grandagon late 70's to mid 80's. and a very late post 2000 Xenar.
Of coarse differences will be far less noticeable as you increase format size and also it's how you use a lens to get the best from it. There were some very poor (in terms of performance) lenses for 35mm cameras particularly 3rd party wide angle lenses in the 60's and onwards and most modern zooms covering the same focal lengths have far less distortion and better sharpness, that's the area of greatest improvements.
Ian