The other issue is that RAID (even RAID 6 with no dead disks) fundamentally cannot deal with data corruption or any of other fun bugs hardware likes to throw at

The other issue is that RAID (even RAID 6 with no dead disks) fundamentally cannot deal with data corruption or any of other fun bugs hardware likes to throw at you like phantom reads and writes. This is because it has no checksumming and most implementations will overwrite the parity if a mismatch is found. There's also the RAID "write hole" problem, but most implementations have worked around that since the mid-2000s. I switched to ZFS a few years ago and it's really quite amazing. In fairness, raidz does suffer from the same "resilvering takes a long time and increases the chance of subsequent failures" problem, which is one of the reasons why mirrors are more commonly used. Though unlike RAID, ZFS knows which data on the disk is actually used so can reduce resilver times pretty drastically.