So they are the top places to work because employees continue to work there? That would probably mean they have the highest employee retention.

Doing a quick search of top employee retention rates by company, I don’t see either company even mentioned, let alone at the top. In fact, the only place I saw either mentioned is in this article. If you scroll to the last chart on the page and filter by automotive industry, you will see that Tesla is not near the top, but actually at the very bottom of the list.