Every year is just insane, but there are people out there with more money then brains who will buy the new one each time it comes out just for the bragging rights.
We are more realistic here. We purchase on a 30-36 month schedule. Every unit is purchased with Apple Care. Six months before Apple Care expires we begging to explore selling the unit because we found that a three year old iMac, with even as little as 30 days of Apple Care will sell for more than on that doesn't.
Once we find a buyer, out with the old and in with the new.
I don't always sell the last one though. At times I will keep it ( depending on work load ) and run it along with the new one.
I still have one 20" G5 model from about 2004 and a 24" iMac from 2006 in use here, though not for the heavy work.
I know that in on Nov/Dec 2014 I will put this one up for sale and be looking at a new computer from Apple.
I look at it like this, the cost of say $2400 spread over three years is $800/year or about $67/month and it will perform as good 30 months from now as it does today.
It's a business purchase, and those are not made the same as a personal purchase might be made by others.
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I've been hearing that for the last 10 miles.
