“The friction you set up or remove in the environment is going to have an effect long after you’ve gotten discouraged and are less excited about the new behavior,” said Wendy Wood, a research psychologist at the University of Southern California and author of “Good Habits, Bad Habits.” “That’s why friction is so powerful. It persists.”
https://www.nytimes.com/2021/01/09/well/mind/healthy-habits.html