It'd be nice to have plex login with more than one user meaning things like trakt would update for all users watching the current media instead of just the main person that's logged in.

I like it! See/support this other request: https://forums.plex.tv/topic/129812-fr-plex-home-common-accounts/

Request: Multiple users at once

Topic		Replies	Views
[Feature Request] Allow Multiple Users to Viewing Session // mod: joint watching on same device Feature Suggestions	23	802	July 26, 2019
Managed Users multi select Feature Suggestions	1	130	December 2, 2014
Feature Request: Who's Watching Feature Suggestions	1	75	March 5, 2016
Plex Feature - More than one user watching at a time Feature Suggestions	1	169	January 23, 2021
Play with friends Feature Suggestions	0	135	February 15, 2016