HMM: At Tesla, Departures Mount at a Critical Time.

Chief Financial Officer Jason Wheeler’s impending departure, announced just 15 months after he joined Tesla from Google, will be the latest in a raft of largely under-the-radar exits. Former executives, who spoke on the condition they not be identified, cited a range of reasons for their exits over the past year, including long hours in the rush to high-volume production, mission creep, and a tense culture that reflects their visionary but indefatigable chief executive officer, Elon Musk.

“Tesla looks like a company that is getting stretched to the limit,” said Dave Sullivan, an analyst at industry researcher AutoPacific Inc. “The pressure of getting out the Model 3 is getting to everybody, from the people on the factory floor to the people at the top.”

It isn’t appreciated enough just how difficult it is to design, manufacture, and successfully market automobiles.