The same routine for good things can turn into being a bad thing. Brcause it can make you inflexible. So there's a trade off there.

For me, it was when I was in a situation where I had to work 80 hours a week to keep my job. I had to get rid of my routine for 8 months and I am happy I did it otherwise I would he poor today.

Being inflexible is only a problem for other people! :P