Apple: hold my beer.
These are sent via WhatsApp so the audio recordings are mp4 files, which for some bizarre reason won't open in Music and instead open in QuickTime Player, despite definitely being audio files.
OK, not a biggie, so export to m4a from QT Player. Transfer to the machine that has my audio library. Create a new playlist, transfer some previous songs over, then try to drop the new m4a's onto the open playlist. No go. Play around for a while, figure out that the entity that accepts the drops is the TableView, not the surrounding view. So you can't drop the new files into the empty space below the songs, you have to drop them onto the existing songs.
Who programmed this? Who didn't pay attention to this when doing QA? Who approved it for release? iTunes used to be if not the, then certainly a flagship app for Apple.
OK, plug in the iPhone, as for some reason wireless transfers don't seem to be overly reliable.
No Finder, I don't want to back...too late. Ok, do your backup. Waiting. Spinner. Waiting. Repeat. After a while it says it's finished. Unplug and ... the songs are not there.
I quit Music.app, relaunch it, and lo-and-behold, the songs are now no longer in the playlist in Music.app either. Re-add them, carefully aiming for the table, sync again (hey, it remembered we just did a backup and doesn't try again, kudos!), and now they show up.
Whew! Only took 15 minutes or so, the last time I was futzing with it for over an hour and the songs never synced. Or one did and two did not, which is obviously Much Better.
How can such basic functionality be this incredibly broken? And of course this is just one tiny example, there are legions others, as many others have reported.
With this, I noticed that I hadn't actually expected better. I knew it should be better but I hadn't expected Apple to actually make it work.
In other words, I had set the Bozo Bit on Apple. By default, when Apple does something new these days, I fully and quietly expect it to be broken. And I am surprised when they actually get something right, like Apple Silicon. And it wasn't an angry reaction to anything, in fact, it wasn't even much of conscious decision, more a gradual erosion of expectations.
It Just Doesn't Work™.
And that's sad.