Maybe this is an incredibly dumb question, but I was actually doing research on a very similar question to the OP and I still don't really have a definitive answer.
I currently have a series of docker containers running Plex and the full *arr setup on the Linux drive of my PC. Because I dual boot my machine, I want to migrate my server to a NAS so I don't shut it down whenever I switch from Linux to Windows. I'm seeing that I could theoretically use a NAS just for the media storage and keep all the transcoding (ie all of the docker containers with sonarr, radarr etc) on the existing Linux drive. However, would the Plex container live on the NAS or the Linux drive? I'd assume the NAS...?
Appreciate it! I'll play around with the configuration and see what works. Initially I had a really fun (/s) time with permissions on folders that were accessed by multiple containers (could write to one folder but not read it with Plex, for example) so I'm going to phase it in incrementally, hopefully without breaking my current setup.