where do you come up with this stuff?
Nvidia will not waste a billion dollars on RT and cancel it because AMD becomes competitive.
History. Look back at the transition from Kepler to Maxwell where NVidia cut out a lot of their compute (look at the double precision), in part because AMD had picked up a lot of market share since launching the 4000 series. NVidia had been investing a lot into compute, but AMD had a much leaner architecture that let them gain some ground.
It's actually really funny, because right when NVidia decided to segment compute into a separate card, AMD launched their new architecture that included it in order to catch up with what NVidia was doing with CUDA. This is why AMD now has the reputation of the power hungry cards, whereas it was formerly NVidia that was getting dinged for Fermi (endearingly called Thermi) being a power hog.
Now, NVidia didn't waste that, since they just cut the technology from their mainstream cards. You can still buy cards (Volta) that're just oozing compute power, but they largely trimmed that from their mainstream cards starting with Maxwell, and it was really smart for them to do so given how dominant they've been since. AMD bet on compute being big, but there are only a handful of games where that's paid out for them.
If AMD manages to come out with a competitive new architecture, RTX is going to end up relegated to the high end TITAN style cards so that transistors can be thrown at practical performance. At the end of the day, that's what's going to move cards to the most consumers.