There are enough articles out there from hardware kickstarters that failed post-funding for me to believe that manufacturing new products on-price and on-time is insanely difficult. I'm sure Apple can design and manufacture 50+ iPhone prototypes for any yearly launch. But startups really only get one chance to get it right before their funding runs dry.
You don't even have to look at startups. Look at all the teething issues that Tesla has had ramping up production, versus an established car company. Look at production issues for things from established companies like the Nintendo Switch. Even the iPhone X had its production issues.
