I think the system information widget contains to much KDE specific information and too few system information.

Ie. Qt version and KDE frameworks version are really specific to KDE, also they can easily be looked up in any "About" information of an KDE app.

Plasma version is ok, since it is your desktop and I also wouldn't where to look it up elsewhere (except packetmanager).

What I'm missing is:
Kernel version (and name maybe)
Mesa version (along LLVM maybe)

uptime could be nice, but it is actually more of a "show-off" information.



For reference my "inxi -G" output:

Graphics:  Device-1: Advanced Micro Devices [AMD/ATI] Fiji [Radeon R9 FURY / NANO Series] driver: amdgpu v: kernel 
           Display: x11 server: X.Org 1.20.9 driver: amdgpu unloaded: modesetting resolution: 2560x1440~144Hz 
           OpenGL: renderer: AMD Radeon R9 Fury Series (FIJI DRM 3.38.0 5.8.18-1-MANJARO LLVM 11.0.0) v: 4.6 Mesa 20.2.2