Don't underestimate existing business relations and contracts. The format you're using is the format that your TV/soundbar/tablet support. There's only a few manufacturers of those and they have decades of business relationship with Dolby.

Breaking those proprietary realtionships with open source has always been a losing battle - look at HEVC vs. VP9 vs. AV1 battles or AptX vs. AAC vs. Opus.

Media industry is a surprisingly tight knit and very conservative club that doesn't adopt outsiders easily.