Thomas, do you use Cubase 8 on a daily basis?
While IMO it’s the most feature-rich DAW of any available, and the best for what I do, it still has poor shortcomings. Like any DAW, they have to cater to the prosumer market which unfortunately means continually adding new features. There is nothing wrong with that but resources are always limited. Some old features never get fixed. Core functions suffer. Workflow suffers. And those “boring” features such as mix undo are seemingly low priority while they outsource an improved version of Loop Mash. They want to call it “pro” yet release broken Mackie MCU upon first release just prior to Christmas.
While you can’t really even compare the two, I don’t see the same historical cycles and issues with Wavelab. I think it is because Steinberg/Yamaha gives much freedom to PG? This, I’m thankful for.
I wouldn’t pretend to know the inner workings of their relationships. I’m only basing my thoughts on how Wavelab has evolved since version 4 and how Cubase has evolved since 1997.