On the resolution of film, check out Ken's article : https://www.kenrockwell.com/tech/film-resolution.htm

It's a bit dated, but the principles are still valid.

Also check out this interview. https://youtu.be/Uizuh5S3bVE?t=1777 About 29 minutes in, Tyler talks about how clients who don't know the difference between film and digital based prints choose film each and every time without knowing it.