Hi uarte. No, I never did the registry changes, nor the audioengine.properties trick (which I didn’t even know it existed before reading this thread). It was clear for me since upgrading to Cubase 9 that, if I wanted to work with virtual instruments at low latencies without spikes, the only solution at the time was to disable hyperthreading, so I simply did that and moved on, until now. In fact, reading about these possible improvements in multi-core was the main reason for me to purchase the update to Cubase 10.
Of course, I’ll make my best to help Steinberg / Fabio if there’s something in particular I can test in my rig for them.