The only reason Flac is the most popular sound code is that both compression and code -solving is faster than others. The same applies to many formats such as JPEG, MP4, MP3, Rar, Zstandart. What is fast is always advantageous and is a reason for preference. Even if they are not free. As you mentioned, of course, it does not apply to every situation.

Flac is already existing. There are also a lot of workers on it. I always want to try independent and different things.