I am reaching out to provide feedback on the lack of Dolby support. Many users have to choose either 4k or 5.1, due to most TV not supporting passthrough of PCM 5.1 via arc. The options for a majority is either 4k with stero sound with the chromecast hooked up to the TV or 5.1 sound and 1080p hooked up to soundbar that does not have 4k passthrough.
Same problem here. My 2018 TV doesn't have eARC so 5.1 PCM pass-through is not possible.
Would really like to get a feedback if DD 5.1 will be available for stadia? Otherwise I don't have any chance to enable 5.1 Sound.