"Tesla & Ford are the only American carmakers not to have gone bankrupt out of 1000’s of car startups. Prototypes are easy, production is hard & being cash flow positive is excruciating," Musk tweeted Thursday.
Farley retweeted Musk early Friday saying only, "Respect."
Elon Musk has 48.5 million followers on Twitter.
Jim Farley, who assumed the helm as CEO on Oct. 1, has 27,200 now.
Vehicle sales will be at the same ratio.