I had my last laptop (a Thinkpad T42) for 8 years without upgrading the HD or (I think) the memory. Admittedly, I wouldn't want to do that with most manufacture

I had my last laptop (a Thinkpad T42) for 8 years without upgrading the HD or (I think) the memory. Admittedly, I wouldn't want to do that with most manufacturers' laptops, but Apple's are pretty sturdy too. I don't see any reason why a MacBook Pro bought today shouldn't still be perfectly usable in three or four years.