And the statistics are only from the latest release, not over all KDE users. They mention this in the text but the disengenuous plot is what people see.
>For transparency, the one caveat in all of the above is that I've deliberately always focused on people using the latest Plasma release. We do still have a sizable chunk of users on X11 still using Plasma 5.27. Including them, the total Wayland adoption rate is about 76%.