[sonnyblarney]

First - that 'lock in' is very evident by the nature of the contract.

Second - because newer things are available, it does not mean that others become 'obsolete' in three years by any means.

The vast majority of business do not need to have access to the latest, specific version of what are essentially commodity bits of hardware and software.

It's not really a risk for most businesses, and if it is, then obviously they can pay a higher price for the volatility inherent in switching at any time if they so chose.