That’s useful information, but in my article I limited my coverage to only streaming audio services, not streaming video ones such as YouTube, which are a whole different story on their own.

Having said that, Opus is not really designed for full bandwidth high quality audio streaming, it’s designed primarily for low bandwidth, low latency operation (e.g. full duplex real-time speech systems such as video conferencing). Although it is a very good lossy codec, it isn’t really used for high quality stereo music streaming, and there’s no real reason it should be. It certainly can’t compete with a lossless codec like FLAC.