I have looked over the postings closely but may have missed something. What is the current knowledge, now, in early September about Apple-installed SSDs and performance degradation over time? Early concern beginning with the release of MBP 2010 in April was the the lack of TRIM support in OSX. Has anyone at this point noticed or measured significant degradation of factory-installed SSDs? I am ready to purchase a MBP 2010 and I am considering a 256 GB SSD. Thanks in advance to any willing to comment.