The Solid State Disk (SSD) technology is fairly mature and the use of SSDs predate the availability of laptops by over a decade. I've been involved with SSDs dating back to 1975 that were then used on systems that required very high reliability & uptimes supporting ATM networks. The use of SSDs on mainframes is old; on laptops it is relatively new.

High cost per byte compared to rotating media resulted in SSDs being used generally only for the operating system functions that required low access times such as swap disks for virtual memory. SSD disks way back in 1975 had access times of 5 msecs while the traditional rotating media had access times in the 30-50 msecs access times.