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?
You don’t need to have local copies of all your media with kodi. A NAS works just fine.
Streaming a full 4k movie rip takes more bandwidth than most people would have available on the go. Plex/Jellyfin can offer transcoding on the server for such usecases.
Are you talking about on mobile? I don’t think people are hosting kodi and their content on their phones.
Because streaming on mobile is a huge usecase for many people