The actual thread the post being referenced is in is about Dolby Vision and HDR10 playback on Apple devices, so I can see where a rant might come out I guess...

edit: Yup just saw GP's reply and they clearly have opinions about HDR.

Did you read the story?

Plex broke Dolby Vision. Plex is working fine for me because I'm not using this botched format and don't have a TV which is designed to make sure everything is too dark for you to see anything, the same way Chris Nolan poisoned movies by making sure you can never make out what people are saying.