It sucks. I'd like to have the option. It was probably my idea but I thought that when TRIM was enabled the drive seemed faster. I might do some tests to check.
You most assuredly do have the option. Trim Enabler is still available and works quite well with Yosemite, if the proper precautions are taken. The need for this utility and the precautions that need to taken with it's use are not the fault of the aftermarket community, but because of Apple's PigHeadedness.
http://www.cindori.org/software/trimenabler/
Lou