Much faster access time, 100% reliable, no moving parts, can't crash the drive head with sudden loss of power corrupting drive. Much smaller, lighter, much lower power consumption. Much less heat generated. Much less headaches for Service Dept compared to HDD as there is virtually no service required.
An SSD can fit mechanically into the same hardware slot as a HDD.
Just started showing up in laptops last year.
MFP Copier vendors are always jostling to say they were first to market with some new gizmo, the SSD would be an easy first.
There was some conncern in the past about Read Write endurance but that has been solved. The concern really only applies to high volume server applications. Copiers would read/write much less.