I don't know of any specific critiques written in the last year or two (but only because I haven't looked for any!).
However, 15 months ago I upgraded my existing desktop to add 2 x 240gb Intel 530 SSD drives. Prior to that I had 4 x internal drives: OS/Programs on 1, LR Catalogs on 2, ACR Cache on 3, Image files on 4. That system was initially built in 2010 and had served me very well.....the only reason for the SSD upgrade was because I was envious of the performance my son was getting on his newly built system with a pair of same SSDs for OS and Programs.
I used the SSDs to replace both the OS/Programs drive and the LR Catalogs drive, and recycled one of the replaced 7200 drives to use for Docs/Music/Videos etc (to keep the System drive just for OS and Programs).
As expected I saw significant improvement in system boot time, and program start-up time. I did NOT see, nor did I really expect to see, "significant if not thrilling" performance gains in Lightroom running performance. This may be because performance was pretty good before that, so it's difficult to see where the improvement would come from. The logical place for any improvement would be in the Library module, as the Ian Lyons article suggested, but it's really difficult to judge. Moving from image to image in Library (thus reading from the preview cache on the SSD) was already quick to the point of there being no lag, so how does an SSD improve that? Maybe running library filters in a large 100k+ image catalog would benefit, but my main catalog is only around 10k images, so filtering is already fully responsive (it's the same when running a friend's 70k image catalog). And in Develop, most of the activity there is CPU/RAM with disk reads from the non-SSD images drive. Exports and Preview rendering are mostly CPU-intensive, so very little to be gained there.
Sure, if you have the catalog on a slower drive, such as an external drive, then there should be some benefit.....though I would suggest that anyone experiencing "thrilling" performance enhancement would have been running a below-par system.
I'm not saying you won't benefit from your SSD upgrade plan, just trying to set expectations to avoid major disappointment. I certainly don't regret doing the upgrade, as the system is much slicker, but mainly in the OS and program start-up.