I use Kodi as my main TV/Steambox UI. It handles movies, shows, twitch, live TV (wrote addon to work with local IPTV provider), launching Steam games, streaming from sources :).

Movie/show progress is synchronized to Trakt, and Trakt also provides list of trending shows and movies, so I always have an overview in a single place, no need to go to 10 different streaming services.

But the default UI is just terrible.

I use it with Arctic Horizon theme and it improves it a lot but not everything can be improved with custom theme. https://forum.kodi.tv/showthread.php?tid=351756

I wish they did a UI overhaul to make it a bit more modern.

Having customized it over the years, I see how powerful it can be, but defaults are quite unfriendly.