As I wrote above, Cubase 10 addresses resources differently, so the limitation to 14 logical cores is now gone.
Theoretically, any CPU can be used, and if issues arise the engine can be further tweaked.
But not all architectures are created equal or are tailored to a certain kind of processing - 2990WX at full potential? Difficult to say, honestly, the same CPU might work differently, even just switching the motherboard.
On the SCAN main page, http://www.scanproaudio.info/, you currently find an article about Cubase 10 directly on the homepage, with pretty detailed info on the 2990WX performance and benchmarks against other chips.
It’s really worth a read, particularly on the perfomance and overhead loss, which according to their test isn’t DAW-specific.
Also interesting to read about the stable OC figures.