As Brandon stated above, AEM 6.4 and later will be the only versions of AEM with an out of the box integration. If you are using an older version of AEM, you can continue using the DTM integration or build a custom solution to use Launch.
I'll copy our AEM community managers incase they have anything else to add.
I believe that is correct, only 6.4 has an out-of-the box integration with Launch. 6.3 had one with DTM. However AEM is consuming the Launch APIs that are available to any external system.