2: I'd love for people to jump in and help out - and I've asked. Besides working on the kernel code, help with things like documentation, userspace tools and the website would really make a big difference. But I'm ok with doing development by myself for now, it's not a dealbreaker.
3. Probably indefinitely, but I'm getting tired of eating ramen, you know? I'm working on bcachefs full time, and have been for quite some time.
4. For going upstream? That's a long ways off, for a variety of reasons - a big one is that I don't want to freeze the on disk format until the main features are at least mostly done, and finishing snapshots is quite a ways off.
But it's plenty stable enough to use now (what I'm hearing from users is that it already appears to be more solid than btrfs). Also, I think I'm going to prioritize multiple devices and replication (and possibly start on erasure coding) after I finish off compression, so that'll come sooner rather than later.
I have a few questions for you:
1. Do you have any other active contributors for the project?
2. Are you seeking any help besides donations?
3. What's your estimate for how long (and how active) can you maintain the development at the current level of support?
4. Do you have any roadmap with approximate dates?
Thank you for your work.