I had a ssd drive crash about a month ago. With an hdd I am able to recover most anything. The ssd just stopped and there was no way to get anything off it. I replaced both drives with hdd and took the performance hit. In my 25 years of computing I have only lost 2 hdds. First computer I got with sdd and it died.
You absolutely must backup SSDs religiously. They do not degrade, they just fail completely, like flipping a switch.
SSDs also present a new challenge in the data forensics field.