"the only SSD's I've seen fail have been in win7 machines where the users (who of course, knew better than anyone else) had enabled scheduled defrag after being told not to. But hey, they know best."
When you enable scheduled optimization on SSD's in Win7. Win7 sends a "retrim" instruction on the schedule. This is in case "Trim" instructions have been lost durring heavy disk use, due to queue overflow.
This "scheduled optimization" is not defragmentation. Which is why Win7 doesn't use the word "defragmentation".