Jerome was unceremoniously removed from his position as Senior VP of Sales & Service after sales in China faltered, which wasn't really his fault. Elon blamed slow China sales on poor communications regarding charging options, and called his own people in China "morons" or a similar word. Unfortunately, Tesla's problems in China had little to do with charging confusion and much more to do with the internal economics and politics of the country, as well as domestic competition from other EVs. The sales of competing EVs actually increased while Tesla's dropped. Tesla's Model S is not perceived as a luxury mark in China, and at its luxury price point it lacks many of the amenities wealthy Chinese look for in a car. It was at that time that Musk said he would appoint a regional VP of Sales for each region that would report directly to him.
Musk didn't move Jerome to US Region Sales, which would have been the obvious move, but instead he seemed to marginalized Jerome into a customer satisfaction and delivery role. I can only speculate that Jerome may not have been happy with that. Musk went out of his way, at the time, to say that this was not a demotion. In my opinion, if you have to say it, then it really is. In hindsight, I think it was. Despite Musk saying Jerome would be taking over a customer sat role, that never happened and there appears to be nobody at the company currently tasked with such a role. It has been more than six months, I believe, since Elon made these announcements. Jerome used to be listed as part of the management team on Tesla's web site, but there is no mention of him now.
I would like nothing more than to be wrong, but I know what my gut is telling me and I know how companies like this operate. When Apple got rid of Scott Forstall, the VP of IOS development, they spun it to Forstall staying on in a "consultant" capacity to CEO Tim Cook for several months after his departure was announced. I've seen parallels at startup companies where I've worked in the past. This sounds eerily similar.
I would like nothing more than to be wrong. Believe me.
I think all of us early Model S owners have an extremely high regard for Jerome and I agree that it would be a great loss for the company if he left. I just don't think we should treat speculation as fact and then become indignant over it. No one outside of Tesla knows the full details and there are plenty of other reasons for Jerome to take a leave.