goudie, a lot of users found the Metro/Modern interface intrusive, far from intuitive and cumbersome to use on a non-touch device. It gets in the way. It offers too few improvements for desktop users to induce them to spend the time needed to learn - they don't like it and see no reason to adapt.
Personally I don't think it's that bad but find the Metro/Modern stuff fairly pointless and irritating on a non-touch device and install Classic Shell to make it more usable.