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by postmodest 810 days ago
ZFS expects to have a huge cache, and defaults to 50% of memory, separate to any other fs cache. For advanced features, it requires a certain amount of cache per TB of storage.

For single-disk non-checksummed, non-deduplicated storage, it's a lot of wasted code that a device with a "mere" gigabyte of RAM doesn't need. So APFS hits most of their needs: volume management + journal + better disk layout for SSD.