As someone who has spent decidedly too many hours in Aegisubs to create at least somewhat decent subtitles, for projects which have long ago gone the way of the DMCA, these changes feel quite insulting. ASS has been a perfectly cromulent subtitle format and should've been widely adopted.

Though on a related topic, on Netflix it is not just the subtitling that is bad, the translations are awful too. They are cutting every corner so hard I fear they might become a circle.