I am actually referring to endurance. Irrespective of the RAID mode, I would expect each drive to be written exactly the same amount of data at the same time. If all models are identical and have been purchased at the same time, one would expect that the same firmware will allocate the same writes to the same cells (in RAID 1 it will be the same data, in RAID 5 the data will be slightly different, but the size will be the same). So in theory the wear should be identical. Obviously this only applies to a RAID mode where you have parity.
But I read that like 3-4y ago. We should have more experience with SSDs in production now so I was wondering if that thinking still applied.
> If all models are identical and have been purchased at the same time, one would expect that the same firmware will allocate the same writes to the same cells
Not really, you'd expect them to diverge over time as the cells aren't going to be all 100% identical - they'll have different failures, different error rates, and different read patterns will result in different read-disturb errors, all of which will effect even completely deterministic block allocation.
Regardless, as I said, you monitor endurance. Drives are unlikely to just silently wear out out of the blue unless you've been completely ignoring their SMART readings, in which case, more fool you.
But I read that like 3-4y ago. We should have more experience with SSDs in production now so I was wondering if that thinking still applied.