The Model-T is a great comparison. It was a commercially successful product, not a prototype under NDA. It also tells you a lot about the state of the industry.

Ford Motor Company was founded with an investment of $28,000 in 1903, the equivalent of 34 Model-T cars - say around $2 million now (for a very expensive $50,000 car).

It was profitable in very short order, selling several models of cars. The Model-T itself was available for sale in just over 5 years after the company was founded. Ford innovated in production and product design, and made ground breaking products available for the masses.

Magic Leap raised $2.3 billion (the equivalent of 46,000 cars) 8 years ago. Total publicly available output: a few promotional videos.