If all you have on your Nas is pirated movies, then yes
> when they do happen they aren't likely to be a big deal.
But with more sensitive data it might matter to you. Ram can go bad like hdds can, and without ecc you have no chance of telling. Zfs won't help you here if the bit flip happens in the page cache. The file will corrupt in ram and Zfs will happily calculate a checksum for that corrupted data and store that alongside the file.
> when they do happen they aren't likely to be a big deal.
But with more sensitive data it might matter to you. Ram can go bad like hdds can, and without ecc you have no chance of telling. Zfs won't help you here if the bit flip happens in the page cache. The file will corrupt in ram and Zfs will happily calculate a checksum for that corrupted data and store that alongside the file.