Not to scaremonger, are we to expect some extent of software rot on KDE because of this change?
He may have contributed in other ways that I'm not aware of, but overall KDE is in a very good spot with many more developers working on stuff.
This is probably the greatest curse and blessing of modern Linux: there are an impractical number of distributions. I guess you could probably say the same thing for desktop environments, various services, bootloaders, etc.