Best speakers in-class, consistently decent keyboard and touchpad (butterfly aside), consistently decent monitor/screen, consistent software design language, "It Just Works(tm)" convenience, social status symbol.
With the speakers, it’s the tuning, not the hardware that is great (though I will agree their tuning is the best). The rest related to hardware, every flagship also does it just as well, but a little different. Software, if you’re comparing to Windows then anything will win, but macOS/iOS is really hostile to users in other ways. Idgaf about “status symbol”.