This is certainly true, but it's very unfortunate that anyone using a

Gnome app under KDE (e.g. Evolution) also has to deal with the
completely separate gnome-keyring system. AFAIK kdewallet and
gnome-keyring do essentially the same thing but they don't talk to each
other. It would be so much better to have a unified system that
supported both APIs, but I guess that's never going to happen.