I have a Crucial M4 128GB WITHOUT trim at the moment. I have been running them for over a year with no issues.
However, I do have Bootcamp going on a DIFFERENT SSD, is Windows taking care of the OS X drive whenever I boot to my Windows? I am not sure how trim works. Does trim only work when you write to the disk? Or does just having the drive recognized in Windows 8 running trim in the background?
I have purchased the Samsung 840 Pro 256GB for a replacement. Do I need to enable trim for my new SSD?
I have not noticed any performance issues on my Crucial M4 since when I purchased it and trim has never been enabled.
I am running Mavericks.
I upgrade components regularly, so I will probably upgrade my SSD again in a year or two.