Also, from the link below:
“Dante networks must be on the same LAN.”. So, perhaps not necessarily fully isolated, but it doesn’t and can’t support WAN - pretty much as I thought. WAN would be where potential latency would creep in. You’d probably want to isolate the LAN anyhow, so that stray packets don’t get in the way and add latency.
I write (part of the job) networking software for a living. Mainly WAN though, or dedicated multi-cast networks, carrying multi-media / TV, which is why the idea of Ethernet networking rang alarm bells. I know full-well what happens when things go wrong.
https://www.audinate.com/resources/faqs
Edit: also, this extract (from the same link), highlights one of my concerns:
"Most off-the-shelf switches are fine for use with Dante, apart from unmanaged switches with Energy Efficient Ethernet (EEE), which interferes with Dante clocking.
[PDF link] lists some of the switches that are not compatible with Dante."
So - you’d potentially need to carefully select your network switch.
Dante Via, which I think is the system which uses a PC’s inbuilt network interface, adds 10ms latency by default (info from same link above). Although, a dedicated PCIe interface, can reduce that latency to below 1ms.