bcachefs: a general purpose COW filesystem

For those who haven't kept up with bcache, the bcache codebase has been evolving/metastasizing into a full blown, general purpose posix filesystem - a modern COW filesystem with checksumming, compression, multiple devices, caching, and eventually snapshots and all kinds of other nifty features.I'll admit I had to do a bit of reading to educate myself on what bcache actually is. Fascinating to see that it has evolved into a full-blown file system.