So, new CPU will not supported under W7
That is not quite correct.
It is a big dick move by Microsoft to push W10 adoption with such anti consumer measures, but new CPUs are actually "supported". First of all, the kernal is identical from vista to win10 and the rest of the system is identical from 8.1 up to 10.
The big issue lies with Windows Updates. They will post a fail message, if you try to install W7 updates from Mid-March onwards.
Since no new features are being updated to Win7, only security patches remain the thing, that is being denied to users of Ryzen or Kaby Lake CPUs.
Since the scheduler updates are already pushed, there is no performance loss for having Ryzen and KabyLake CPUs on Win7. If CPU architecture won't see a major change (which it won't for now) There is literally no downside of using Win7 with newer CPUs.
If your router has a FireWall and you do not host any services, which you port-forwarded, there is absolutely zero need for security updates on your workstation.
Although Linux DR would be nice indeed, it is unfortunately blocked by the fact, that if you use Max to compose your scenes there is currently no way of exporting what Max does in it's system to prepare the scene data.
Correct me if I'm wrong, but using stuff like plugins makes it not possible to push to Corona Standalone, as such no chance for Linux DR.