If you are a #Linux user, as a caveat emptor, despite #DasKeyboard advertising Linux support for the 6 Professional #keyboard, they do not support Linux (or MacOS) for firmware updates.
From support:
"The firmware updater can only be run from a Windows computer or VM. I'm sorry we do not have an installer program that will run on a Linux distro."
This doesn't mean it won't work out of box, but you won't have access to bug fixes that might impact you.
Dell don't provide #BIOS updates to the #fwupd project for my model of XPS laptop sadly, so I thought manually I'd check if there were any updates. Turns out I hadn't updated in 18 months. I had estimated about 6 at most. Funny how time flies.