>Being invaluable to the team gives you negotiating leverage.
In my experience that hasn't worked out. Being invaluable just means more pressure gets piled on you, and any reward or leverage you think you might be getting in return doesn't materialise. The credit you earn doesn't translate into anything tangible.
Managers just don't take into account the fact that you can and most likely will leave. The project ends up screwed but that's no longer your problem. I've seen it happen multiple times at multiple companies.
In my experience that hasn't worked out. Being invaluable just means more pressure gets piled on you, and any reward or leverage you think you might be getting in return doesn't materialise. The credit you earn doesn't translate into anything tangible.
Managers just don't take into account the fact that you can and most likely will leave. The project ends up screwed but that's no longer your problem. I've seen it happen multiple times at multiple companies.