Upgrade 4.0.2?

We are using 4.0.2. I'm wondering how advantageous it would be to upgrade to latest version. Is there a big improvement in experience? I am concerned that some of the add-ons we are using might get knocked out, in which case we'd probably not want to just now.

You can always do an new install of the new version and test before you upgrade.

Thanks for the tip. Will definitely keep in mind.