[Zope] Plone the new Zope?

I haven't done any Zope work for quite a while and have just restarted out of necessity. Things seem to have changed in the last few years. I get the impression from the age of the Zope installs, the state of disrepair and link rot of the zope.org site that Zope is in its final death throes as an independent entity ? I tried to look for an independent version of Plone that I can install on an existing Zope = the only install I could find is a complete installer including Zope. Is Plone the new Zope?