Duane,
When you say
in this controlled environment, ideas like growing in food forest layers becomes moot
In my opinion, this is not correct. I think you are falsely assuming that sunlight is the only significant factor in a food forest. My understanding is that the different types of root systems from the different plants combine in the ground which, together with the Mycorrhizal Fungi, create a sort of biological internet where plants can trade nutrients. This has been proven to have a significant impact on plant root growth and, one would assume, on the overall nutritional density of the resulting food.
I would also think that more intensive planting could occur within a given square footage using the food forest model because then there is a specific type of plant for each niche of space. Their existing idea seems to ignore all the other niches. When they say they will "expand to other crops," I interpreted that to mean they might grow other herbaceous crops, such as various salad greens, but that is an assumption on my part.
aquaponics and the like are dead ends
It's a very bold statement to write off an entire approach to growing food, especially based on the as of now un-implemented ideas of one startup. Yes, introducing fish would probably require a deep water, wicking, or flood and drain approach rather than an aeroponic one. That's easy. The upside is that there would be no ongoing input of hydroponic nutrients, which is going to be very expensive for this startup if they go this route. The aquaponics approach would add an entirely separate yield, potentially with the same overall footprint (although they specifically mention they have extra space).
this place is designed to be run by robots!!!
didn't anyone notice that?
ROBOTS!!!
Yes, automation is exciting but also likely inevitable over time. The more interesting question is specifically how robotic technology will develop and can that technology be used to enable / automate true permaculture systems that mimic nature. I'm not impressed that a factory farm can use technology in a similar way to any other factory. In contrast, when I personally imagine a permaculture future, I see it as being technology-enabled so that routine tasks are automated inside of an idyllic Garden of Eden type environment.
I think a PDC would only confuse the issues
If you honestly think that a PDC would "confuse the issues," I would respectfully submit that it may be time for you to attend a / another PDC. I find the quality varies a lot based on the instructor, but a good one really clarifies the issues the world faces and how we can proactively respond using a permaculture approach!