Subtitles causes transcoding - burn in setup has to be chenged between diferent combinations of formats

Found it, knew I saw it somewhere:

But all the transcoding stuff still applies. .pgs and .ass always result in transcoding.

So definitely, if there’s magic trick or secret sauce to not transcoding PGS, I’m curious. But since they’re literal images I don’t see how that’s possible on the TS-453be.