ive been using kodi (xbmc was better moniker) since google killed sagetv. i recall attempting plex, but it seemed to lack some open/extensibility (its been awhile).
i have a side project i want to make as a modular plugin generating a cable layout with original air orders and networks/channels… kodi seems most optimal, but ill admit its been a long while since i looked at plex.
so why plex over kodi?
Ya Plex vs Kodi is really more an apples and oranges comparison. Should be Plex vs Jellyfin.
That said though, I did start off with Kodi as my own media center on a Raspberry Pi, but eventually discovered Jellyfin and have really enjoyed it. Kodi is great too, but I think Jellyfin is the more refined modern streaming equivalent akin to Netflix that's fully open source unlike Plex.