A lot of people do tend to leave their job because they became stagnant or the work environment became to comfortable. As a new employee the managers and engineers always praise my work and give me feedback on how to improve. However, when I talk to the engineers who have stayed at the company for longer periods of time they are completely drained. After a while, no one will say “hey great job” because it has become expected of you to reach a certain standard. When you have been at a company for over 10 years not a lot of the projects are exceptionally new or as exciting in comparison to when you first start off because the excitement has died down. Some great companies know how to keep their employees happy by giving them a promotion or raise. When people begin to get too comfortable with their environment then they begin to limit themselves in a box which causes them to maybe leave their job.