Me neither...
Hey LoneWolf, thanks for reply. Best post that I have read in a long while
Looks like we are both on the same page but seeking for that efficient Distro-Desktop in a slightly different way such that it makes no real difference.
Not many here understand RAM – as I have said many times – name me a Distro-Desktop that starts out at idle inefficiently sucking up RAM and then by some miracle gets more efficient as you work load it..? It ain’t going to happen. I will write a Topic on RAM and the Slow Zone if I can be arsed.
I am not even slightly perturbed by which method you happen to use at any one time – even neofetch or that dreadful toy-town conky. (did you miss top rather than htop and Performance or Task Manager live graphical displays?) Please be clear about RAM units though. Also you can list in order which packages use most memory in htop.
My initial experiments 4 years back, were done against all advice and myths; using Trisquel-mini v8, which uses LXDE, on my Dell Latitude E6420 i7 8GiB RAM. It ran like greased lightning I then loaded it with every heavy app I could find including 3D CAD and Pitivi video maker-editor to try and break it – no chance.
Got banned from Trisquel forum for promoting Trisquel-mini and also itsFOSS, Manjaro, Endeavour and more – just the usual groupthink-Fanboy-Moderator KDE XFCE suspects. As Trisquel-mini got slower with v9 and even worse at v10 I went distro hopping again – not Trisquel’s fault though; look upstream to ubuntu..!
One day I stumbled across this Greek distro
Antix which seemed to get rid of the ubuntu top layer of the gnu-linux cake. It had to grab my attention 
Without knowing of lighter versions
I installed the FULL version and within a few minutes had it set up with
the hated and unsupported LXDE.

It performed better than their WM only standard configs so much so that they banned me for posting that Locos por Linux guy using only
88MiB RAM with a fully functional LXDE desktop plus Browser and LO. He also has his own official spin: Loc-OS Linux.
Please take no notice of those here on this forum who say that I am running a
stripped down distro – this is clearly ridiculous with over 150 apps and according to Synaptic I have 1695 packages installed. Take no notice at all about their negative comments on Connection Manager – again ridiculous..
All this requires 160MiB at idle – 1.5GiB watching three Ffox web page videos at the same time with LO Writer open ready to edit file – 1GiB with 100+ Ffox tabs open.
I played with Suse for a few minutes – it was awful. Best of the bunch seemed to be Gecko OS – never been tempted to go and revisit – just too inefficient for my taste. See screenshots below… Same goes for anything starting with a K..! Mint is too popular and inefficient and I don’t like to run with the sheep or crowd if you prefer!
XFCE has grown heavier and heavier year on year. Have not looked recently but some tables showed it not far off KDE and Gnome. I have never found a Distro-Desktop that used XFCE to be efficient.
Hope you are keeping warm - Ziggi
Gecko on an old Tosh Satellite 2GiB RAM..