Yea, like a car the mileage in relation to its longevity usually counts more than the age. (of course a car left sitting will deteriorate more than an SSD left sitting but that's besides the point)
What's the SSD rated for? I hear SSD Life's trial or Open Hardware Monitor offers information you'll want to see.
My SSD is just shy of four years of age and it isn't giving any signs of kicking the bucket.
This specific SSD isn't giving the aforementioned tools enough information to assess its health in fine detail beyond "healthy" though. (and CrystalDiskInfo pegs total host writes at over 500 TB which I frankly don't believe.)