To go back to the original question, I feel like you really need to split the smartphone into a few categories and break it down to what is a convenience that adds to your quality of life, and which parts are constantly wasting your time, and taking away all that you have benefited from “the good parts” of the smart phone.
I don’t see significant negative sides to having apps that you don’t check in on for updates or postings, rather are only used for you to execute a specific task, such as Waze, Mobile banking, weather, Uber, uber eats.
On the other hand, social media apps can waste endless time. Most people are constantly checking in to see if anything new popped up on their account. Once they check their twitter, then they also check their Facebook, Instagram, watsapp, watsapp status updates etc.