Surplus stock.
/tinfoil hat on
Could Turing revision 1 have intentionally been downgraded to coexist with the 1000 series?
Think of it like this.
1. many users know a new card was coming and refused to buy a 1000 series. //the endless wait begins
2. Mining craze dies, so Nvidia/AMD both stuck with huge surplus stock.
3. RTX released with performance on par with 1080Ti. Meaning, early adopters will pay the outrageous price on the new card. Nvidia capitalise on new tech. Intentional high price to sway users to buy up the previous series stock.
4. Users not willing to fork out the cost, decide to opt for the 1080ti instead. Nvidia capitalise on exhausting the surplus goods.
5. Nvidia profit from both architectures. Now surplus is gone, proceed to release a true full fat Turing card with RTX + increased performance gains.
/Tinfoil hat off