"There are obviously still people arranging test-drive promotions for YouTubers but their role isn’t in a traditional public relations capacity. "

That's absolutely traditional PR for an automaker. "Arranging test-drive promotions" means deciding who is eligible for test drives, viewing what is published on YouTube, and deciding if the person will be eligible next time. Even if no words are spoken/written to the YouTubers beyond logistics for the test drive, it is effectively PR.

It's telling they are keeping the most lucrative PR, video product promotion. It sounds like they mainly don't like dealing with the business press. But their investor relations department is going to end up picking up at least some that burden (even if just in the form of ignoring questions). Tesla still has to disclose quarterly earnings figures and its executives will still conduct calls around those earnings releases. They may only allow questions from financial analysts but any member of the public can listen in.