I'm fortunate that the macbook I bought after college has worked fairly well for the last 6 years. I haven't updated it enough, and it's almost at the point where I can't do much to make it modern, but it's worked. My work computers, on the other hand...I went through 5 laptops in 2 years. The fifth one is still working 3 years later, but I've had to ship it back to our IT guy once because of some virus or another - it had blocked the internet so effectively that he couldn't remotely log in and fix it. Had it been my own...I probably would have given up.