SSD's have an actual limited lifetime, based upon the number of times the SSD is written to. Its obviously varies by usage amounts but it if fixed and there is no recovery from it.
I would never have a backup with such an obvious flaw/limitation if my data was important to me.
The limit is why so many high end lightweight laptops die, and cannot be repaired, nor data recovered. Any Macbook Pro laptops after build A1708 are on board SSD chips so replacement of an SSD is basically impossible - it means a new motherboard, so nearly the price of a new laptop. Pretty much any othermanufacturer has the exact same problem.