It's not just capital cost for equipment that needs to be considered at this stage, but also the research needed to make suitable equipment for large scale prod

It's not just capital cost for equipment that needs to be considered at this stage, but also the research needed to make suitable equipment for large scale production. Per the article, a 1"x1" section of metal takes an hour. Maybe some day, but then "there is no need for potentially dangerous Teflon coating in 10-15 years" would be more appropriate.