That is a great question Talha! I believe our classmates shared some great reasons for why this might be. In addition to the aforementioned reasons including feeling stagnant, no longer receiving praise or finding new and exciting projects, there seems to be another major reason. That is growth. Growth in position, title, status, responsibilities and salary. Often after achieving a certain seniority it may be difficult to continue to grow in a single company. This forces employees to seek external opportunities that would better fit their skill set.