bcachefs supports a lot of features that would be useful for even home user desktop systems. For example, the filesystem supports snapshots. This would let you

bcachefs supports a lot of features that would be useful for even home user desktop systems. For example, the filesystem supports snapshots. This would let you do something like have apt (in Ubuntu) create an automatic snapshot of the filesystem before running an upgrade, so that if the upgrade fails or causes problems you can roll it back trivially. It also supports native compression, saving users tons of disk space. It supports combining multiple devices together for redundancy, and it can checksum all of your data so that you can know if a file was corrupted without it introducing transparent failures into your system. It supports copy-on-write, so that you can make instantaneous "copies" of files or directories which take no extra space unless you change them. So yeah, there are a lot of functionalities that we can enable with newer filesystems. ext4 is pretty great all in all, but there are a lot of modern features that modern hardware and concepts enable.