When Nova first came out I wrote a small extension [0] to provide an autopep8 formatting, but there is too much manual management on the user's end. Since there is no API to manage extension dependencies, the user has to manually install and specify the path to where `autopep8` is, which to my mind is a lot of friction.
Compare that to VSCode, where there is a whole API [1] for formatting extensions!
[0]: https://github.com/ReagentX/Nova-autopep8
[1]: https://code.visualstudio.com/blogs/2016/11/15/formatters-be...