It looks like they took a break this summer but plan to do another release of WriteFreely.
There will definitely be future releases, especially once we get through a roadblock with the tool we use to cross-compile WriteFreely [0]. Otherwise, anyone who wants to see the project move faster is more than welcome to contribute, especially with tasks like code review, to help clear out those PRs [1].
[0] https://github.com/techknowlogick/xgo/issues/155
[1] https://github.com/writefreely/writefreely/discussions/550