Very informative point. I am assuming (Yes, I know, not good) that the OP will ask/research before buying one to know what to get.
Yes, I have one to load with my OS. And it corrupted my data once. I started out with 64GB~. After the corruption i now have 59.6 GB. So something happened to the SSD to loose about 3GB of data.
No matter what type of HD you get, if it be SSD or normal, you can get a bad one. Did you RMA it to get a new one/your money back?
Wait, what?! the larger the drive, the higher chances it is for the data to fail.
The bigger the drive, the more sectors it has, so the longer it will last because it has more areas to write to. Because the lifespan of a SSD is related to how many times you can write data over a specific area, the more the better. You are saying that one apple is better then 10 cause you have a higher chance of getting a rotten one with ten then one? True if you are picking apples at random. BUT going with industrial SSD's, where the components are cherry picked one by one will negate that issue all together.
The video is informative, but not in a way that that relates to the OP's question.
... I was wondering if I set the server up on a SSHD would fix the lag? ...
Will it fix lag? It will have less lag then a normal HD. This is the question of the OP. As to the pro's and con's of actually using a SSD for this function is a different question. Would I use an SSD for mission critical data? I might, under specific conditions. I do not think that a home server for minecraft would fall under that. Also, setting up the computer/server to backup the SSD to a normal HHD once a day or so would be a good option.
There are other options to fix lag. Their might be better options to fix it. BUT using an SSD will, WILL, reduce the amount of lag that occurs when the game is saving data to the HD. You will get even less lag if you install the OS onto a different HD then the Minecraft Server because then the OS writes and Minecraft writes are using two different areas to write data to, and so you do not have to share bandwidth.