On the other hand, if all it takes for the employer to be threatened is hiring one bright driven individual, than you don't want to work for such a business any

On the other hand, if all it takes for the employer to be threatened is hiring one bright driven individual, than you don't want to work for such a business anyway. If you limit yourself to teams with a product that has "moat", your entrepreneurial streak won't threaten them. (Although the churn concern remains, so a lot of talk is needed to see how visions and plans for the future collide.)