Kodi + an older television without "smarts" make for an actual "smart" television, one which does not try to sell you as a product to advertisers but which uses its "smarts" for your benefit. This is how the part of my family which likes to watch television (which is everyone but me...) access their network-provided pablum (my bias might show through a bit here and there) using a "dumb" TV with a Raspberry Pi on the back. It can even be controlled through the TV's own remote which makes this not just useable to those who like to tinker but also those who just want to donate some brain cells to the gods of "entertainment".
I use Kodi for this purpose - direct view on a local device - and Jellyfin for 'remote' applications, e.g. for making our extensive photo and video collection available to family members. Jellyfin is a media server while Kodi is an extensible media player which happens to have some limited support for remote access/streaming. In other words they are complementary, not in competition. I have never used Plex nor felt the desire to do so.
I use Kodi for this purpose - direct view on a local device - and Jellyfin for 'remote' applications, e.g. for making our extensive photo and video collection available to family members. Jellyfin is a media server while Kodi is an extensible media player which happens to have some limited support for remote access/streaming. In other words they are complementary, not in competition. I have never used Plex nor felt the desire to do so.