[krisoft]

> The promise of 3D-printers haven't really played out

I don't know what you think the "promise of 3D-printers" was but if you think it hasn't played out then probably you had unreasonable expectations.

> Why aren't we building "products" from lego rather than seeing them as toys?

Would you buy such a product? They would be much larger than the same thing not made out of lego. They would shatter in your bag during transportation. They would be more awkward to use because of the rectangular shape of the bricks. They would collect dirt in all the crevices/studs.

Look around your home or recent purchase history, which products would be improved by making them out of lego?