I just got a free 32Gb SSD to add to my freenas 8.3 box running an i5, 2 x 2TB WD red and 16 gb ram. I want to add a jail and mini dlna. What would you do with a 32Gb SSD?
If I had a small SSD, I'd put my plugin jail(s) on it. That way, I could spin down my disks if I wanted to.
Using an SSD for logging or write cache is totally useless for home use.