closed as primarily opinion-based by Romeo Ninov, Fiximan, DarkHeart, Jeff Schaller♦, muru Dec 20 '18 at 0:26
Many good questions generate some degree of opinion based on expert experience, but answers to this question will tend to be almost entirely based on opinions, rather than facts, references, or specific expertise. If this question can be reworded to fit the rules in the help center, please edit the question.
There hasn’t been a full release of Xfce for a while, but the project is still alive. The git repositories are very active, and a number of projects inside Xfce have had releases since Xfce 4.12: Thunar, the file manager, in October 2018, Ristretto, the picture viewer, in August 2018, etc.