I wonder how many stealth mode companies have actually delivered anything? Magic Leap used to be in stealth mode back in 2016 and there was so much frenzied sp

I wonder how many stealth mode companies have actually delivered anything? Magic Leap used to be in stealth mode back in 2016 and there was so much frenzied speculation around it in the media. Last I heard, they had delivered some headsets of industrial process automation and that's about it.