We had an outage on audio3 on 2/6 at 9:00 PM CST, and this morning we rebooted all the audio servers to implement some maintenance.
Other than that - we haven't had any other problems or outages on audio3.
Additionally, I have over 5 feeds hosted on audio3 that are broadcasting from 2 separate locations, and I've not experienced a single problem with disconnects or connection problems.
There are a lot of factors in play for real-time audio streaming, and almost 90% of the time the issue is with the "last mile" connectivity.