That's true. The company has had some layoffs in recent years and my manager even admitted that they just needed me to cover for vacation.
I get your point, but I saw the background check report for my current employer and they asked all my previous employers from the last seven years whether I was available for rehire.
My concern is that if I am marked as not eligible for rehire that would show up in background checks by other jobs in the future.
It doesn't state any specifics related to leaving other than that being an at will agreement.