It's similarly bogus here. Early Asahi development tried to upstream as much as possible but ultimately still maintained a gigantic pile of downsteam patches, which wasn't a sustainable model.
Most of current development is focused on reducing that pile to zero to get things into a tractable state again. So things continue to be active, but the progress has become much less visible.
M2 to M3 was a complete architectural change that will require a lot of reverse engineering. As far as I know no one is working on this. The M1/M2 work was a labor of love of largely one dev that has since moved on.
The project is still active and working to upstream the work of these devs. But as far as I know, no NEW reverse engineering is being done. Ergo, it’s a dead end.
Most of current development is focused on reducing that pile to zero to get things into a tractable state again. So things continue to be active, but the progress has become much less visible.