Future of resource registries under Plone 5 branch

Continuing the discussion from What's the scope of upcoming Plone 5.2?:

neither in the "roadmap", nor in @esteele's answer, I found mentions of the resource registry situation, but I remember there is a PLIP about it:

was this discussed during the conference? is this going to be tackled in the Plone 5 branch or not?

any comments on this?