I did cc for my eldest almost 12 years ago. It worked for her.
My other three it didn't work. I have a differnt mind-set now.
My eldest had a strict routine, in bed by 7:30. Was fed on my time...
Fast foward to now and my 2 year old goes falls asleep at 11, it's his schedule. He wakes around 9 or 10. We snuggle up together when he's falling asleep.
I'm not apposed to cc but if after a few nights it isn't working and the baby is more stressed (older babies I mean, not newborns) I think it's time to stop.
My eldest (the one I used cc on) is a happy, healthy kid, but then so are my others.
I often have people say "your kids should be in bed earlier, especially the two-year-old" why? They're getting 10ish hours over night..
Do what works for you, every child is different, every family is different.