This would have been really nice to have a decade ago. In the age of virtualization, what's the use case?
EDIT: I'm not asking rhetorically. It really would have been nice to have 10 years ago for my use cases. What use cases do you envision for bcachefs in 2023?
You're running local storage for a VM host? Or are you talking more like whiteboxing your own NAS?
I understand what bcachefs does. I've used bcache many years ago to do exactly what you're describing, albeit for bare metal servers. I'm asking why.
I'm just trying to understand what the use case would be in 2023 outside of a home lab, given that cost per gigabyte is basically at parity between SSDs and HDDs when you consider TCO (i.e. when you price in the extra power and cooling overhead for the HDDs, failure rates, and such).