The sweet spot when to do the SC is very strain and grow style dependent.
I try to do it little by little all the way up to when branches start to harden too much.
Then again the majority of my grows go completely without supercropping.
There’s been a few times here and there where I have LATER realized “Oh, I have obviously supercropped this plant because the main cola (or cola number X) has been bent a lot and now its in an angle.” 
It can be beneficial to do in many cases, especially the smaller you grow is, the more I’d recommend to do it.