[pipsterwo]

They originally claimed the stainless steel panels would replace the internal frame and thus be more efficient to produce. But they shipped with a traditional frame

[interestica]

This was genuinely innovative and intriguing. Did the numbers just not work out for manufacturing or some other thing get in the way?

[cogman10]

The way they proposed doing it was folding steel sheets into the CT structure. My guess is they were never able to produce consistent enough folds. It takes pretty precise metal working to make that work.