[leonroy]

Agreed. What an arrogant attitude especially considering their Macbook Pro (2015) recently had a corruption bug which necessitated a firmware update: https://support.apple.com/kb/DL1830?locale=en_GB

Good checksumming to detect bit rot is exactly what is needed since as an owner of said laptop I have NO idea whether any of my data was affected.

If Apple want to say 'the majority of our devices are mobile and checksumming puts a large performance overhead' then that's one thing. But to claim it's not needed is just plain wrong and makes me worry that Apple's product managers sit in an echo chamber hearing only what they want to hear.