Re: A triumph of marketing over substance
Yup, most generational GFX upgrades offer little more than 10-15% on the previous. I don't own a single game that includes support for DLSS or AMD's FSR - but even if I did, the version my card supports is already out of date because I've owned my card for over a year. Tying performance gains to a technology that loses all manufacturer support within a year is just artificially propping up their numbers.
Then you have the fact that much of the assumed performance gain also assumes that the rest of your PC got upgraded with the graphics card. No point in thinking you'll see much difference in performance if your mobo's PCI express version is 2-3 years old.