Mainly the prestige but all four of those are good points. There aren't many places where you have an opportunity to do things for the sake of doing them, most places either don't value technology or don't have to budget to investigate new and interesting technology. I love the place I currently work and love the people I work with, however I don't want to be doing line of business crud apps forever. If I could get a good wage in academia I would but it seems much less likely than getting a job at one of those companies I listed.