I have a MacBook I purchased in late 2008, it's the aluminium model. I'm just getting curious about how long it will last for? It's almost 5 years old which seems very old for a laptop. However it runs just like new, despite that I use for over 4 hours a day almost every day since I have owned it. I've never had to replace any parts, even the battery is still going well. I have had to replace the charger several times though. I take extremely good care of it but I'd just like to know how much longer it should keep going for? What is the average lifetime of one of these MacBooks? Thanks.