Intel keep same socket and same chipset 3 years for High End Platform.
I think 10 cores CPU will cost 1500$, but always will be option for around 400$ and 550$.
We could keep same memory on beginning and later to replace. Investment should be only processor if we sell X99 motherboard and CPU.
Or even better investment will be only motherboard when I sell mobo and CPU I will buy successor of i7-6850K. But motherboard is again investment around 450-500$.
Only if Rampage VI Gene show up for 300$ example.