Using Tesla engineers to review code is a pretty solid idea considering he can trust them. Musk companies like to run lean so I'm sure this initial review is to find people who are "coasting" and trim them. I'll say that I'm one of those coasters though not for twitter. I live my life and happen to write software for work. I don't think it's wrong for companies to run either as a coasting company or as a lean startup as long as they don't break any laws.

I'm curious to see what comes out of twitter. I honestly don't see how Elon can make his money back. lol