Users on the Roon community forum have been experimenting, and one was able to continue running for 4 hours after disconnecting the internet. Danny replied: This may be the 4th time I’ve said it: Zero minutes. You may find it to be longer, but different things will break at different and unpredictable times. You should not rely on 2.0 working without internet access. Use 1.8 Legacy if you need offline access. Here is Roon's explanation for requiring internet access: https://www.reddit.com/r/roonlabs/comments/xkhtk6/comment/ipeh7co/ Whatever their reasons, they seem to be baffled by the backlash. They are so caught up with doing things their way that they forget that the most basic function is to just play the damn music file.