Again - how to force Cubase to use all cores?

I think @Scheissberg said it all, but just want to add that emphatically agree with this analysis. Cubase/Steinberg management team, which is now Yamaha Inc for some time now, is not addressing Cubase issues seriously, despite it’s large, but dwindling user base. Sad, very sad. Why should I stay with Cubase? I keep asking myself this question, lately. I patient is running out as well. The cooperate gamesmanship around updates has become tiresome.