Good point , on a very interesting subject.
Imo it would depend on the level of golfer , ie if youve been playing this sport for a while and are somewhat decent at it , it wouldnt matter what type of iron you play with, as long as the grooves arent worn away and you have good grips , and the results are working for you .
New golfers , improving golfers , may want to upgrade to the newer technology to help them improve their game , but other than that , stick to what you like and what feels good and works for you