DSD support is in the works, but I don’t think it’s going to be included in the initial release. It’s not ready yet, and we’re running out of days to get it into a mature state.
When we do release DSD functionality, we will support DSF right away. DFF may come later.
DFF is a bit more complex. It was designed as a studio format more than an end-user distribution format. It supports non-destructive editing features that can result in content for a single track being spread across many files, and does not support metadata tags. All of these things increase the complexity of DFF support.
We firmly believe that DSF is the best DSD format for end-users going forward. That doesn’t mean we will never support DFF, it just means that DSF is being prioritized.
As always, we will remain open to feedback on this stuff.