I could be wrong but ass and pgs are image based and are "burned" because that's the only way to make them compatible. Burning requires transcoding, end of story.
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ass are text-based.
Well crap, maybe Plex just doesn't like them then
Oh ok, that sucks :(
I wonder how streaming services offer the ASS-like (hehe) subs without the burning delays.
That is a very interesting title if you don't realize what community it's posted in
My Apple TV 4K will play PGS without burning in
Dang, I just realized my FireTV does PGS without burning. Why do people always add embedded ASS subs if they require burningggg?
Anything Android-based using the builtin Exoplayer (Google's open-source AOSP media player of choice for Android) will need transcoding since Exo doesn't support styled subtitles fully.
https://github.com/google/ExoPlayer/issues/8435
Feel free to echo your frustration there, Google is unlikely to care otherwise I'm afraid.