Plex. Its been getting shittier for years.

Meanwhile JF has been improving in leaps and bounds.

Since he mentions enshittification, I assume he means Plex.

However I am pretty sure both will have some bugs. I use jellyfin, so I can only speak about that. But one annoyance is that the androidTV app sometimes doesn’t have the best subtitle support. However it allows you to open movies in external players, which is a workaround.