That's interesting, I hadn't realised that Dante isn't routable. Another reason to avoid it!
I'd be interested to hear about AVB in broadcast. All the broadcast folk I've spoken to (mostly UK based) are using AES67 and / or SMPTE 2110 in new installations. (2110-30, the audio element of the suite, is very closely aligned with AES67 and can generally be made to inter-operate without too much sweat.)
Of course, the above standards all depend on PTPv2 for synchronisation which benefits from special features in switch hardware, just as AVB does. I do, however, see wider availability of PTPv2 aware switches than I do 802.1ba compliant ones. And, for those on a tight budget, AES67 will work on just about any switch hardware, even if it's not PTP aware. (In my home setup I currently have a bunch of AES67 flows running fine on a £30 Netgear switch. Not recommended but it works!)
Cheers,
Matthew