As a podcaster and streamer, routing audio on a Mac has historically been an absolute headache. I use SoundPipe to manage a multi-track setup: I route my browser audio (for capturing reaction clips), my music app (for background tracks), and my microphone into completely separate virtual tracks that feed directly into OBS and Logic Pro.
It is fantastic because it finally gives Mac users a visual, intuitive mixing board for virtual devices. Instead of blindly routing audio and guessing if an invisible virtual cable is clipping, I can see the meters and control the levels of every app in one clean, unified interface. It takes a notoriously complex, technical problem and makes it drag-and-drop simple.