Less than two years ago, I bought a 120 GB SSD drive, with a SATA/USB adapter, used as an external storage drive.
The frequency of use was once in a while.
Now the drive can't copy some files, randomly. It begins the copy process and then goes to a screetching halt, letting you think that you'll never be able to transfer a simple 500 MB video file.
Moving across folders, experiencing picture preview problems as well, taking ages to show up.
The morale of the story is that SSD is just a joke. It can fail for no reason whatsoever. And when it does, you can't trust anymore. You lose pretty much everything that is on it. On the contrary, HDD failure often results in losing a file or two, except if you have a major crash (the HDD fell off a chair for instance).
If your use of computers is any serious, don't even dream of the idea of booting with a SSD drive in order to make the process faster. Because your SSD drive will fail you. And when that happens, losing your ability to boot is like losing the whole computer.
SSD can't be trusted, period. Hail to HDD.