Why isn't Fortnite in the Nvidia Geforce now app?
Because NVIDIA is currently working with EPIC on the touch implementation. But it is guaranteed to come.
So it's never been outside or what?
As far as I know, NO.
2012-ER Game - Engine for 2021 Geforces?
In addition, massively processor-dependent for you "high counters"?
At some point the best support will come to an end if you don't want to play a 2012 game with an Intel Core 2 Duo / AMD Athlon x2 and Geforce GT (X) 8x00 / 9x00 to GTX 2 x0.
CS: GO can now easily handle any dual core with SMT from 3.0 Ghz and from GTX 660/750 Ti