androbourne :
Not true at all because they are different drivers... if you search in nvidias website. The 10 series are in its own category and so will be the 11 or 20 series (whatever they are going to list it as).
So you wont be downloading RTX drivers for a GTX card... they are in a completely different family of drivers.
Erm, nope, they're the same driver (except maybe if you have a really old card and you're downloading legacy drivers or something) Try going to Nvidia's driver page and selecting a 10 series card and then do it again with a 9 series card, they'll both bring you to the same page, in this case the page for the 399.24 drivers mentioned by the OP. If you look at the "supported products" tab for that driver, it'll list all their cards going back to 600 series. I mean, what actually gets installed might be different, but you're downloading/running the same package regardless of what GPU series you have.
That being said, I wouldn't put a lot of stock in rumours about Nvidia deliberately crippling older cards with new drivers.