That's interesting about Remaining Life rollover from 0% back to 100%. Where have you seen this?[snip]
From what i have seen though, the Health value of these affected drives actually rollovers to 100% and starts counting down again, not ideal since you'd expect 0% health nand to go into read only mode.
I'm unsure whether it's desirable or undesirable for the ssd to continue to be writeable after rollover, because being able to continue to write to the drive may be a benefit.
Do you have any idea whether the ssd's write amplification algorithm changes after rollover? (Or earlier, when Remaining Life is low.) At that point, continuing to run a wear-leveling routine makes no sense to me and would seem entirely self-destructive. Unless my thinking about this has grown fuzzy since I last thought about it two years ago, I think the only desirable write amplification when Remaining Life is low is the minimal amplification that's necessary: copying (and then erasing) an entire block when the host pc partially rewrites the block's contents.