AMD & Intel --> 35nm OK
Intel --> 22nm OK (AMD dropped!)
AMD & Intel --> 14nm OK
Intel --> 10nm seemingly AMD will drop again!)
AMD & Intel --> 7nm in 2020 + PCI Express 4.0 will come
So, what to buy? Actually if you have not an older system of 5-6 years or more, you do not have to update your system. The best computer buying era looks like after 2020 by both AMD and Intel. That time, PCI express will jump to revision 4.0 and I will not update my my desktop and notebook until that time.
Therefore, for now it is not really logical to move to a new system, because new processors only works with Windows 10. In 2020 Microsoft will release Windows 11, will it be fine? I am still using Windows 7, Windows 10 is ridiculus, it looks like ISIS captured my Windows 10 computer because of the black bar, (Their flag is black and white) thus are they captured Microsoft too???
Windows 7 is still much better, being easier to use, but nevertheless, Windows 7 support will end in January 2020. At that time I will think again, to go with Windows or turn to Mac! or what so ever, mobile? Tablet? Anything else?