For SSD write lifetimes take a look at:
They have been performing 24/7 writing to numerous SSDs to determine just what type of lifetime they are actually getting in the real world. The results are impressive and interesting. Most of the drives are up past 200TB of writes and counting...
When deployed properly, the average SSD should easily give many years of life writing GBs per day. SSDs *DO* typically live up to their write lifetimes, if the rest of the drive lasts that long, the average computer user will run into other hardware failure or upgrades long before they typically out-write their SSD.
When purchasing SSDs, the write lifetime is not something that I am concerned about since the numbers are correct, it is the other SSD issues that worry me: compatibility with motherboard and OS, the seemingly bad firmware, the high drive controller/memory failure rate.
I am also a very skeptical SSD user. If other computer hardware failed as much as SSDs the computer industry would be in trouble. My company has almost a dozen computers and the only hardware failure in the past 10 years has been one WD 500GB hard drive and one Monitor.
I own one SSD right now, but so far I still have not replaced all of the system OS drives with SSDs just because I don't trust them at all for consistent long-term use without failure, whereas the WD hard drives in my experience are a known quantity.
I'll take that pint now...