The number of write cycles to any block of flash is limited. Once the write counter for a block has hit the manufacturers hardcoded limit, the SSD will not trust that block to have data written to it anymore.
The whole point of this piece of software is to be smart about how and when it flushes data so it can minimize impact on the write counter.
The whole point of this piece of software is to be smart about how and when it flushes data so it can minimize impact on the write counter.