Question Ryzen 3000 and RAM

Ryzen 2000 1000% supports 3200mhz RAM and we can assume that Zen 2 uses the same infinity fabric stuff that Ryzen 2000 uses, so it's probably worth it.
On most systems RAM quality is first in line to work at high speed, closely followed by MB configuration and BIOS options including conformity to XMP. AMD's AGESA code has large role in that but it has greatly improved. Then there's MB manufacturers which need to optimize their boards on electronics level as well to have DOCP to translate XMP properly and/or have automatic settings to suit both RAM and IMC.