In a nutshell,
Intel Core processors , up to and including the -9xxx will work with the existing Beignet & OpenCL for tonemapping without issues.
Intel Core processors, starting with -10xxx , require Intel Compute Runtime.
-10xxx seems stable, based on forum reports.
-11xxx is mixed
-12xxx is not ready for serious production time yet. (Intel Compute Runtime support is still buggy)
i9-9xxx is a solid move (depending on what your transcoding needs are.
There is no real need to be bleeding edge unless you know you have lots of subtitles to burn. The video quality of the newer CPUs isn’t really any better than the -9xxx IMHO
