Mark Zuckerberg is tired of waiting for Elon Musk to get ready to rumble, so he's moving on -- so says the Facebook founder himself.
The techie billionaire announced Sunday he was throwing in the towel on the planning process, saying it was clear to him that EM wasn't serious about duking it out ... evidenced, at least in Mark's eyes, in all the excuses Elon has offered to postpone this thing.
MZ writes, "I think we can all agree Elon isn't serious and it's time to move on.