Got it but not for my use case then cause I don't want to halve my storage capacity.
Anyway I will try to use it for my main PC which has several disks and continue to use my solution for single disk machines (laptop, vps, SoC...). :)
Note it won't necessarily halve the capacity. Selectively enable it for the datasets requiring it, and avoid the overhead with the rest.
No but parity archives solves a different problem, with only some percent of wasted storage you can survive bit-errors in your dataset. It's like reed-solomon for files.
In order to achive the same with ZFS you have to run RAID-Z2 on sparse files.
Ideally, though, please add an additional disk and set it up as a mirror.
ZFS can detect the silent data corruption during data access or during a zpool scrub (which can be run on a live production server). If there happen to be multiple copies, then ZFS can use one of the working copies to repair the corrupted copy.