There are lots of things to work on. For example, the current AHCI driver doesn't work on AMD hardware that I have tried it on. To be clear, I've tried to solve this, but haven't succeeded yet. I have other stuff to work on for school and personal projects, so I'm not sure when I might get around to trying to solve it again.
Is there a place to put these? There are open issues, but lots of issues have been closed simply because people stopped working on them. It seems like a good idea to have a place that lists all the tasks that would be appreciated if someone were to pick them up, with links to the corresponding GitHub issues.