[flas9sd]

true, but the complexity is greatly reduced between a caf container and (since Safari 17.5) a webm encumbered opus: the provider can offer 1 webm file to all platforms.

Especially in podcasts where it's just voice the savings in storage and traffic are significant. My own listening preference is 32kbits opus at ~1/4th size of the original 128kbits mp3.