Genuinely curious, is there an alternative to spanning tree? He'd mentioned not implementing it, but that feature is a life saver the 1% of the time that you need it.
Uses IS-IS to distribute the link-state db. And allows you to utilize an entire mesh, not just a sub-tree.
Ugh this term bothers me. Just call it routing! That hails from a day when routers sucked so much wind the marketing team at Cisco had to invent a new term for the stuff that did it fast.
Yes, I'd very much like to see TRILL gaining more widespread usage and attention, but fundamentally it's equivalent to IP-IP encapsulation plus IS-IS for link-state and iBGP for the outer IP layer, just with fancy terminology (RBridges and so on) and standardized administration/operational semantics. (Which is a good thing of course.)
I run several spanning-tree free networks and will never go back.