I encode parts of my FLAC music collection to 96kbit Opus for the mp3 player that I use in my car, or just walking around. Cars and cities are noisy, and the earbuds I use aren't great, so I'm not concerned too much about the quality I'm leaving on the table, but it's good enough and the space savings are awesome.

But it is popular! YouTube's preferred format uses opus for most, if not all, videos upload in the last ~5 years (they also offer an AAC option alongside it). Several VoIP services use opus, including Zoom, Discord, FB Messenger, and WhatsApp (until recently). Opus is part of WebRTC and thus implicitly available for audio/video conferencing software that runs in the browser. And if you look up what audio enthusiasts recommend you use to encode your lossless music for smaller file sizes, it's almost always opus!

We have got to the point where we can afford to stream Lossless Audio file already. ( And then lossy re-encoded on the fly to our wireless earphone )

For higher bitrate 190 - 256 Kbps AAC-LC offers 99.99% compatibility, only losing to MP3 while offering near indistinguishable audio quality all while being patent free.

Opus does shine in anything lower. I am not even aware of a codec that is as good at 128Kbps to 160Kbps range. The lower end sub 96kbps is also competitive if not the best at certain domain. But for compressing music or pre-recorded audio it is a solved problem or non-issue.

Opus the audio codec massively predates Opus the LLM (2012 vs. 2024).

No one owns the English language. If it breaches some trademark that's something else and very specific.