Hey there again, Ken!
With hardware is really hard to predict exactly when total corruption/failure would occur. It could be tomorrow, next month or in 10 years, you can never really tell. However, I believe yours is most probably going to fail soon, if the diagnostic utility you have used listed the drive as failed. In such confusing cases, I recommend using at least one more SSD diagnostic tool (you can check the link in my previous post) and benchmark the results! I'd also suggest you check your SSD manufacturer's official website for any brand-specific utilities you can use to check these stats.
Wear Leveling Count is the attribute that represents the number of media program/erase operations (i.e. the number of times a block has been erased). This value is directly related to the lifetime of the SSD. The raw value of this attribute indicates the amount of exhausted P/E cycles and it's inversely proportional to the normalized WLC value. Once it hits 1,000, the WLC will hit zero.
Basically, the current value stands for the remaining endurance of the drive in percentage, meaning that it starts from 100 and decreases linearly as the drive is written to, eventually it will drop to 0. This is an estimation of how many write, erase, rewrite etc. cycles each block can go through before failing. Here's the source of information
Keep in mind that there are different NAND technologies, so some SSDs have blocks that last for around 1000 P/E cycles each, others, on the other hand, can endure as much as 30,000.
Hope this article is useful. Keep us posted if you have any more concerns!