They already did a lifetime test on SSDs up to TLC:https://techreport.com/review/27909/the ... -all-dead/
All these drives lasted BEYOND 500TB writes, even early TLC drives. at 256GB/drive, that means ALMOST 2,000 complete drive writes.
Even if you're writing the entire drive once a day, that still buys you OVER FIVE YEARS of life.
Typical drive writes of a highly-loaded desktops are 1/4 write to 1/2 of the drive write per-day, so your endurance goes up to ten to twenty years.
Since I stopped buying OCZ SSDs, I've never had an SSD fail in use - they've all been upgraded before death.
The memory is incredibly reliable (as long as you don't buy the lowest-priced drive you can find), an the only issues you will typically encounter are other quality control problems.