Archetypes remains supported in Plone 4 and Plone 5, which is perhaps a couple of years away from release, but it is clearly deprecated. So, while it is probably important to ensure that people are aware of Archetypes, it appears that we should be steering them away from using it for any new development.Archetypes
Plone 5 should be the last major release with Archetypes compatibility. For form based content types, Dexterity is the future. We will want to provide a simple migration route for existing content (by automatically creating a persistent Dexterity schema). Any custom templates or views would require manual updates.
-- Laurence Rowe, Shuttle Thread Blog <http://shuttlethread.com/blog>.