How to "properly" use: Specular, Glossy, Roughness & Reflection maps

Very intresting thanx!!

I’m reading true that topic.
As so for now…strictly taken, specular is for the old (Tech.) workflow. Or use a node (or some other tricks).

Now for simplicity’s sake. Based on this image…

Can I conclude that?:
For Metal - Roughness workflow: Rougness → Roughnes slot
Metallic → Specular slot

For Specular - Glossinessworkflow: Glossiness → Roghness slot
specular → Specular slott

???

Could one of the pro’s here make a screen shot on how to connect these maps to the principled shader for both workflow’s?

If possible 1 screenshot of a simple node setup (without extra nodes) just connecting the maps straight on.

And 1 screenshot of a somewhat accurate node setup. But to keep this also simple, just using a ColorRamp (to reverse or saturate a map) node in between some of these maps if needed.

I understand that you can go as deep as you want with these node setups to get a as real and accurate result as possible.
But for simplicity’s sake for us less experienced and starters, I would be nice to have a clear guide on what maps goes better in what slot.

Here’s a screenshot from one of the guys over @Reddit:


What do you guys think?

I forgot to mention that I mainly Use EEVEE. I imagine that results between EEVEE and Cycles can differ. But a simple setup should transfer wel between both right?

(hope I’m not being mr. confusious here)