In the last few months we have added a built-in compositor, a new screensaver, file manager integration and a bunch of optimisations. Seems like pretty decent progress to me.

Master isn't the development branch though; you want these things to be fairly stable.

The 'develop' I mentioned is the name of their development branch. Regardless, one of their contributors made a couple sibling comments in this submission indicating there is more work going on than immediately visible by quickly looking at commit timestamps - which I am happy to hear.