I think it's a matter of habit and the more you do it the easier it gets (like training a muscle). 4x is very useful when watching video tutorials (lynda, udemy

I think it's a matter of habit and the more you do it the easier it gets (like training a muscle). 4x is very useful when watching video tutorials (lynda, udemy, etc) and generally I'm able to understand everything including the audio. 6x is when I just want to see the slides and code but can't understand the audio. It's rare but sometimes very useful.