After the Plasma 6 update, I found that I still have version 5 of kinit (https://archlinux.org/packages/extra/x86_64/kinit/) installed. The software is supposed to “Process launcher to speed up launching KDE applications”
yay -Rns khotkeys has removed 40 more packages (!) from plasma 5, without breaking anything apparently. I don’t remember what could have marked this package as explicitly installed…