Duolingo has changed its home screen from a skill tree to path. They claim that it is "optimised". In fact, it is hard to navigate, hard to see progress, hard to choose a topic you feel you need a revision or you feel like learning at the moment. It is not conducive to learning at all. For those who are not ready to give up Duolingo once and for all, I would like you to join me and press for a revert back to the old skill tree or at least make the new path optional.