Growth comes with too many things to handle. If you are catering customers where they are dependent on you for everyday chores, customer success should be paramount.
In the book, category creation the author talks about the Customer Success Team. A team dedicated to delighting end-users.
As a leader of your organization, it becomes super important to define the success on which the CSM team aligns to. There have been many occurrences where product development prioritizes CSM requests to last, that should not happen.
Last not least, celebrate small wins.