My solution is switch to running linux. Apple is planning on massively crippling MacOS Server and removing all the serious network server capability (like Mail, DNS, DHCP etc) in favour of remote Mac control (no use to me whatsoever) so I’m going to switch everything to running on Linux instead.
However, that’s not a solution for everyone, many of whom need to run PMS on a Mac and it disappoints me that the Plex developers first of all got it so badly wrong by not allowing MacOS PMS to run as a server process, despite calling it Plex Media SERVER and then refuse to even comment on the cries for help from users who require this facility.