yup.
before you heavily get into 4k, you should learn more about it, its not as simple as dvd/bluray content.
Plex, 4k, transcoding, and you
unless your mac mini has a new enough intel cpu (see my first reply) and you have plex pass, its not going to be doing much, if any, 4k transcoding.
the solution to that is simple, don’t try to use 4k content on devices that can’t direct play it.
