SSD often die a "sudden death" with no warning-signs.
But technology in this area is evolving so fast, it would be almost silly to base any advice on historic performance.
Simply untrue, except for maybe crummy SSDs from no-name manufacturers.
Today's consumer SSDs from the fabs (Intel, Samsung, Toshiba for example) have an annualized failure rate (AFR) of around 1/10 of 1%. Yes, 0.1%. The annualized failure rate on HDDs is from 1% on up.
So while it is true that you should back everything up, if you have seen more failures with SSDs than with HDDs in your lifetime, you've been buying the wrong SSDs.