Reddit blocked third party apps but they didn’t block personal-use API access. With the help of some apk-editing tools that I won’t mention here, you could import your own API key into a third party apps and continue using it fully (including posting and commenting). I’m using Reddit Sync still.
My API key still works, but my understanding is Reddit recently blocked the generation of new keys. So at some point my key will probably die too. At that point, that’s the end of Reddit for me.
In fairness to Plex, I bought a Lifetime subscription during a Black Friday deal over a decade ago and it’s still serving me well to this day.
I have jellyfin set up ready to go but Plex has the UX down at this point. I’ll keep using it whilst my lifetime subscription remains valid.