PC here.
iTunes is intentionally broken on PC. Slow, pauses on start, etc. Seems like it was written in basic running on an IBM XT.
JRMC. Mainly for convenience. All add-ons I need are there. MadVR for video. Supported all the strange video formats used for porn. Two parametric EQs. Real time PCM to DSD and DSD to PCM conversion. Variable DSD filters. Bitrate conversion. Upsampling. Automatic album cover pull down. Crossfeed that doesn't screw up FR. I other words, I don't need to fuck with it. And there are no dialog boxes that pop up whenever I plug in my iPhone.