Why on *earth* would you expect that? It's a *completely* different technology, with completely different failure modes.
Well, almost everyone is saying how reliable SSDs are because they have no moving parts to wear out. Also, since I do not really care about the speed, the only reason I would buy a SSD (instead of a cheaper HDD) would be reliability. If that SSD failed before a hard drive that has been already spinning for 7 years, I would be disappointed.
SSD lifetimes aren't measured in years, they're measured in *writes*. If you had an SSD powered on for 10 years but never written to, it might well have another 10 years left in it (barring failures that are common to all electronic devices, that is). Keeping a platter spinning for that long would be asking for trouble.
That being said, the reliability of an SSD isn't so much in that they last for a long time, it's that you can know with a fair degree of precision *for your use case* when they are going to fail *after*, so you can budget to replace them *before they fail*. This is necessary because, unlike hard drives which often fail gradually while giving you a chance to pull your data off, SSDs fail instantly and completely.