Updated the USB key creation: a mention about umounting the USB drive before writing the ISO to it.
In regards to the WiKi, I would recommend gnome-disk-utility even to pure KDE DE’s. The reason being that gnome-disk-utility is not DE dependent and uses mostly code that is in a base install. Even on a pure KDE Desktop Envirnment it only pulls in 11.5 MB total install size and does not pull in any KDE dependencies.
On a fresh KDE install with no GTK dependent apps installed yet, I get the following:
[don@EnOS-KDE ~]$ sudo pacman -S gnome-disk-utility
[sudo] password for don:
resolving dependencies...
looking for conflicting packages...
Package (4) New Version Net Change Download Size
core/cracklib 2.9.7-2 0.89 MiB 0.24 MiB
extra/libhandy 1.2.3-1 4.00 MiB 0.65 MiB
extra/libpwquality 1.4.4-3 0.40 MiB 0.08 MiB
extra/gnome-disk-utility 40.2-1 6.23 MiB 1.00 MiB
Total Download Size: 1.98 MiB
Total Installed Size: 11.52 MiB
:: Proceed with installation? [Y/n]
I have used gnome-disk-utility for years and as you know in the last two years I have burned a lot of EnOS ISOs. If I am updating a devel ISO, I just plug the Thumb drive in, bring up gnome-disk-utility and re-burn it. If something such as un-mounting is required Disk Utility just takes care of it.
Pudge
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I have been using Ventoy for a while now and it may be worth mentioning.
With this you don’t have to flash your drive every time, just drag and drop your iso onto the drive,
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Yea I have 3 distros on a USB using Ventoy. works quit well. 
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