Don't count on a retrofit
From a quick glance at this press release, it would appear (unfortunately as I'd hoped it was mainly a software exercise), that the updates are primarily hardware and I can pretty much guarantee that Audi won't be forking out the considerable cash to "update" any existing cars. So unless there are some software updates that can do some optimizations, we existing owners are out of luck. I was afraid of this when we decided to go down the first run e-Tron road, but not super surprised. That said, it would be great for Audi to make any software optimizations backward compatible to the first run vehicles.