I delete all app that I waste time in, but keep one that are useful. (I won't blow two hours scrolling Lyft, and it's very helpful sometimes) I then set screentime permissions to block websites I don't want to use (like reddit), and prevent app downloads. I set a screentime password and give it to my partner.
This way I get all the "benefits" of a smartphone with none of the scrolling and time wasting. It's also very easy to switch it back to a full smartphone, get the password from my partner and turn off screentime. I'll do this when I travel internationally for work.
Hope this setup helps some others.