@aud @mntmn my favorite Linux music software is #mollytime, but I'm biased because I wrote it.
Rosegarden handles realtime playback completely wrong, but it is ok as a MIDI editor. I've been using Tenacity for simple edits of recordings and to converting WAVs to other formats.
I don't really use Windows for music (beyond keeping the windows version of mollytime more or less at parity), and I've never used Macos for music.