So people actually listen to those podcasts
You are correct - the ES (current) tools will continue to be offered and supported, not everyone wants/needs the additional torque of the Mark II, but now theres an option for those that do.
If it wasn't obvious in the video I'm over the moon excited about the Nano. Its a tool that solves so many problems for professionals and skilled enthusiasts that I have a feeling it will be a very very very hot commodity when it hits the market. I've been using the tester we have here like crazy.
The nano really doesn't step on the Mini at all... they'll both have their sweet spots.
Bingo! This is similar to the analogy I've been giving people when it comes to "what one should I buy when they're available" type questions.
Speaking in real applications I found a specific area the long neck was unusable, but the short was perfect: Correcting a deeply recessed gauge cluster on a car. The long neck had too much length to get into the space without the tool body hitting the surrounding surfaces. The short gave just enough clearance that I could polish the lens in place, in the car, and not have to struggle.