Thinking a record like `DELEGATE <comma delimited list of record types> <priority> <name server>` or _something_.
Noob question: what companies would have to jump onboard to get a new record up and running? Could it not just be one company like DNSimple who first adopts it?
My point was that your wording made it should much more like a hardware upgrade, which is on a slower cycle for sure.
And I think you'd probably good. I hear your preferred OS has a good track record for implementing new networking stuff quickly.
Most servers would likely use both protocols for quite a long time before one could be discarded.