I was a little worried that either upstream bandwidth or firewall nonsense would make it hard to use the new Arc app with my home Roon setup. I’m super pleased to find it basically seamless in my case! After enabling it on my system and not touching a single network setting, I listened to a bunch of music from my Roon server while out running errands today. I had no buffering, dropouts or stuttering. Just music from my house playing in my car. Pretty cool.