@Ipstenu - I have been checking on our customers who request support for our plugins and services. Most customers seem to have outdated plugins, some of which are only compatible with wordpress 2.5. Some customers (around 80% of customers who contact us) have 40% of outdated plugins. I am amazed at how many people have outdated plugins, but with wordpress not telling customers which plugins are out of date. I would love to see admin warnings about plugins that are out of date so that customers are informed of this issue.

However, having said that, when my staff warn customers that their plugins are out of date, 80% of customers do absolutely nothing at all. Many actually refuse to remove the out of date plugins, claiming that they need the plugins functions, even if that means instability issues within the site.

However, even after saying that, I know how many people use each version of our plugins on wordpress and the majority of them are using very old versions, even though we have much newer versions available and they are told about them within wordpress.

What I would love to see is a warning when customers are using plugins that are not for their version of wordpress.