And reddits App-nag setting is not a permanent choice. When you disable it that's a localStorage thing only, so if you sign out, clear caches, sign in elsewhere, still nags you.
This is true. I usually remove all cookies and data from my devices every three of four days - it just seems tidy to do so, even though I usually open a private tab for following links. There is the slight annoyance of logging back in to a few web sites and turning off notifications. That is definitely an opportunity cost, since it takes a little time.