Yeah, but for Untangle? Larger installations have so much IO going into and out of the database that the write tolerance becomes a problem. The speed is nice for bootup, but not as useful at run-time.
Though, an SSD enabled Untangle does let you wander around reports much more quickly. Personally, I use them strictly for the longer warranties on the drives, 5 years for an EVO and 10 for a Pro is quite nice.