Qt is a very sophisticated toolkit that provides everything that is needed to build a modern user interface. Qt is written in C++, thus allowing object oriented development affording the necessary efficiency and reuse of code necessary for a project of the enormous size and scope of KDE. In our opinion there is no better toolkit available for Unix and that it would have been a grave mistake to try to build KDE on anything but the best.
Furthermore, all KDE developers agree that it would have not been possible to build KDE in equally short amount of time without the use of Qt.