Proper HDR support, both on the encoding and decoding side, has been a chore since the beginning. There’s no excuse for Plex. But in the open source community, development started slowly because most devs didn’t own anything that was capable of playing HDR.
It’s a tech demo at this point, not a product. Tim Cook wanted something to cement his legacy so they released it even though the technology was not at all ready yet. The potential is impressive but we’re years away.
Say what you want about Steve Jobs. But his timing during his second stint at Apple was unrivaled. He knew what to bet on and when. And he wasn’t afraid to go all in and bet the company on it.