As you are aware, it's important that you keep your products updated the the latest release. In some cases, older versions go out of support, which means if you run into difficulty within your environment it's possible that our technical support teams will not be able to assist you. In general, we have a wealth of documentation on our products (ie. tech notes, blogs, dwAnswer posts), however, nothing can replace the confidence of knowing that you can call into support to get assistance at any time.
Periodically, go out to the Announcements site below or the review the Support Lifecycle page.
Software Support Discontinuance: Select IBM Rational Products