I just want to make a quick survey in the forum for how much people use their macs. I've got the feeling the turnover would be really low for macs. I've been using mine for a full 4 years now and all I did was swap the superdrive with an SSD and fusion drive hack them via the terminal. I don't do professional editing or movies but I do excessive number crunching, browsing and occasional photo editing. My Mac can still handle all of them fairly good. Despite it being 4 years old I have the feeling I can squeeze out at least 2 more years out of this bad girl. The battery life is still ~3.5-4 hours as well. How often do you change macs? What's the current situation and how was it in the past?