Earlier quoted context omitted.
This is the real competition. I'm not a Mac head but the one Mac in my house that will runs MacOS is connected to my Yamaha piano and runs Garageband. Is there any other software that works as simply as this, on any other platform?
Simple in what way? It's a difficult question to answer because in my mind pretty much any software synth on Linux is just plug and play, but I'm guessing there's a technical gap that I'm overlooking due to familiarity. What complications do you run into outside of garage band, or you imagine you would run into?
I have at various points in my life used Garage Band, Logic, or various Linux software.