Disk defrag. Truth or lie

[AnyOldName3]

Technically, it is the delete cycles it doesn't like, as a write to a completely blank location is more or less painless. It needs to put a large current through each NAND block to set it back to being just '0's for any delete, which causes the dreaded transistor decay. The problem is that any data block which has anything other than a 0 for every bit needs clearing before a write, so once the SSD has been used for a while, every write must be preceded by a delete. Other than that, what you wrote is good.