The main reason I use a phone case is to stop the phone slipping from my hand in the first place. My current and previous phones (Pixel 8 & 5) are alarmingly smooth on all sides.
I stopped buying phone cases when I realized >90% of my phone use is in my own home. Meaning the case is a negative >90% of the time, and I can just be more careful the other 10%.
I'll believe it when they make a phone screen that can survive a fall onto ceramic tile
Give me a phone without a camera bump that sits flat on a table top and I'll stop putting a case on it