Bravo to Apple of APFS
Although mundane, a computer file system is the product of years of work, usually by a gifted individual (see ReiserFS) who is working within a confined set of ideas. It's not surprising that Apple spent seven years on APFS and it has several notable features to show for it. The containerization of partitioning is a modern stroke, allowing partition size to shift as needs evolve. ReiserSF at one time was included in the Linux kernel. It's ongoing maintenance was impeded by its author's conviction and imprisonment for murdering his wife.