Sales men are successful at selling these things because there is no way to test their claims. The conditions to get a valid field test are impossible to meet, just a huge number of variables that could never be controlled. And so they come up with a bunch of engineering tricks that seem to prove that their product is better. What they can not prove and never will prove is that there was anything wrong with bullets that were made 20 or 30 years ago.
I can't prove anything either, too many variables, but I guess I have shot well over a thousand animals, various sizes, but mostly in the deer antelope size. I have done this with various caliber rifles and pistols a few with cast bullets but mostly with standard bullets made by Hornaday, Sierra, Speer, Remington, and Winchester. I cannot recall any time that I thought my bullet was not as good as it should have been.
Sure you can choose one of the oldies for a job it wasn't intended to do and have bad result. Don't shoot varmint bullets at elk, but if you follow the manufacturers recommendations I just can't find fault with the standard bullets.