Interesting blog post!
I'll definitely be checking KDE out after last using it years ago! (no slight on KDE, just my use-case changed and I don't have much use for full DEs on Linux).
Seems osnews.com goes back years and years although I can't say I noticed it until the Asahi kerfuffle and I wasn't impressed with what I saw. Still, not many blogs have that kind of longevity.
As Altima Neo said, a lightweight membrane keyboard is probably the best way to go. For a mechanical keyboard, something conservative like a Filco may be an option, coming in at 1.2kg for an ISO 105. There are versions with no labels, not sure about de_ch.