[armchairhacker]

I doubt “coworkers trying to replace you” has much of an impact.

The bigger issue with some workplaces is that they’re not really close-quarters, because they’re very impersonal. Sure you might be all in the same room a lot, but you’re largely discussing business stuff or working independently. Even corporate “parties” and retreats can be surprisingly professional and unnatural. It’s almost like you don’t really “interact” with the person, you interact with their business facade.

If you’re not just talking business with your coworkers, you’re actually talking about life and hanging out and not having a fake professional personality, then you do form friendships. I say this from experience.

Though talking about non-professional things and not putting on a facade also makes you vulnerable, so those companies where everyone is competing against each other happen to be the ones where everyone is impersonal.