Man I would kill for an ultra-simple, ultra-lightweight, robust music player for macOS that was just like Winamp 2.81, the last good version. No, not foobar.
"Ultra-lightweight" can mean two very different (and nearly opposite) things: some people want a player that has no external dependencies (and thus must do everything itself, like VLC); while others want a player with minimal binary size (which thus will then rely on the OS's AV frameworks as much as possible for media support.) Personally, I prefer the second definition, but it's the harder of the two to satisfy. I…
It should not try to categorize my music library by genre/artist/album/whatever. It should not try to "visualize" the audio with crappy abstract art that look like a screensaver. It should not connect to a remote service to download metadata about a song. It need not even support ID3 tags. No, I don't need yet another equalizer. Playlist support would be nice, but not terribly important. Just pipe the damn song to the speaker, period.
I'm pretty sure that if you do this and nothing more, you will end up with a small binary with minimal dependencies that starts playing before you can even lift your finger off the button. Modern music players spend most of their CPU cycles doing something completely unrelated to parsing the actual audio file.