SSD drives are vastly faster than HDD drives, and many people put their programs and OS onto a modern machine build. Is there any benefit in terms of speed/wear and tear in having two SSD drives; so that the OS drive has Lightroom on it, and the second SSD drives has catalouge/scratch disks on it.

Is there any benefit doing two SSD drives, one solely for cache/catalouge, or is it just better to have everything stored on the OS SSD?