Nice article Rafayel, I’m in complete agreement about how helps drive down confusion and churn. I wrote a few posts on how timing is also important and deferring some messages until after the user gets started. See this for example https://uxdesign.cc/google-inbox-app-uses-coachmarks-cards-to-teach-users-new-features-e2eedba9f889. Also plenty more on our blog.