Not mentioned there (only hinted by "Phoronix benchmarks of ext4 vs zfs in 2019 show that ZFS does win some synthetic benchmarks but badly loses all real-world

Not mentioned there (only hinted by "Phoronix benchmarks of ext4 vs zfs in 2019 show that ZFS does win some synthetic benchmarks but badly loses all real-world tests to ext4"): bad performance if you have a raid0 or raid10 using very fast NVME drives. For most of my usecases, I typically default to xfs over mdadm raid10 in f2 mode.