less then 4GB may working with the DE itself … as long as you do not open a browser so i would recommend 4GB for the minimum today.
Per default Arch is using also tmpfs stored in RAM so it can get full on many different tasks…
Deepin DE the first Chinese DE that proposes an elegant and easy interface based on the OSX model. The idea is to bring and use design ability on Linux to reach a beautiful environment on a user-friendly interface.
The system parameter that appears vertically on the side let you setup everything you need.
The Launchpad is closed to OSX, in one click you could start or add you app. in the menu
The portage of the Deepin DE is already used by all the references Distributions as Archlinux, Fedora, Gentoo, Manjaro, Antergos, Ubuntu etc…
Here’s the description on Wikipedia for Deepin. Might help in describing the DDE:
Deepin features its own desktop environment called Deepin DE (DDE), which is written in Qt. The distribution also maintains their own Window Manager, dde-kwin. The desktop environment was described as “the single most beautiful desktop on the market” by Jack Wallen writing for TechRepublic.
Besides Deepin, other Linux distributions such as Arch Linux have started to include the Deepin Desktop Environment in their package repositories, and Manjaro Linux has a community-supported version that comes with the Deepin Desktop Environment. The Desktop Environment is also available in the software repositories of Fedora 30.
I admit it’s a bit long of a description, but it might give you an idea on how to describe it.
plasma is not so big, plasma is big as you wanna make big with it… thats my opinion, some week configured gnome here, at cold start i saw 1200mb using… with plasma i didnt had , it came atleast close to xfce sorta stuf… i thought mate is not also so big these days…
cinnamon has the older gnome code but budgie is based on the current gnome code. plasma i would describe atleast as flexible & configurable desktop