But the clean install approach may not be the right choice for you. In my mind, the swing point in the decision is this: if you are an experienced Ubuntu user more interested in having a system ready to use and as identical to the previous installation as possible, consider an upgrade instead of an install. If you are not as confident in your Ubuntu-foo, or are more interested in having the latest and greatest packages rather than a system that behaves immediately just as the previous one did, go with a clean install.