Have you ever seen Scrub in Sony Vegas? That’s how this should work: you slide it, project plays itself slower of faster, move another way - project plays itself backwards. The distance you move the scrub determine how fast it will play. For such a tool I see a scenario where I want to hear some particular parts slower (and in lower pitch) to figure out if it have some audible artifacts, etc.
This tool in Cubase 10 just weird. I see only one case I would use it - to record some vinyl scratches (read - useless). That’s all.
What about you guys, when do you use it?