I’m not saying there’s no use for opus- just that if your goal is a high quality listening experience, that ain’t it.
https://www.ecstuff4u.com/2023/03/opus-vs-flac-difference-co...
For instance, I've got a navidrome instance with all my music library accessible from anywhere in the world trough my phone. However there are situations where I may not have internet any connection, so I use the app on the phone (Tempo) to mark the songs I want to be downloaded and available even when offline, but my phone storage wouldn't hold even a quarter of my playlists if I went with the original encode of the songs (mostly lossless flacs), so I instead set it to download a transcoded Opus 128kbps version of it all and it fits on my phone with room to spare. It sound pretty damn good trough my admittedly average IEMs and I get the benefit of offline playback. Even if you somehow had the absolute best playback system connected to my phone you might be able to tell the difference, but it beats not having to rely on internet connectivity.
You could probably argue that these are handwritten letters but the argument still stands.