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the 'positron' a) folds up smaller b) is real c) doesn't use an impossible-to-make single arm multi-joint scara arm 'thing' that would never work.

neat concept, but unrealistic.

It’s a concept design, not a product you can buy.
Yep, I want to see HN's take on if its a good or bad design
Whether it’s good or bad depends on if it works, and to know that it needs to be built.
I think a few things can be inferred from a design alone