For me, there was a clear transition when SSDs came on the scene. Prior to that, when using spinning disks (particularly in laptops or laptop-like scenarios suc

For me, there was a clear transition when SSDs came on the scene. Prior to that, when using spinning disks (particularly in laptops or laptop-like scenarios such as iMacs), you could always tell when the computer would start to thrash and things were getting bogged down. Your productivity is halted until the computer gets its act together. Now with blazing-fast SSDs, that _rarely_ happens. It was one of the early draws of tablets—no matter what you were doing at any single time, the OS as a whole remained fully responsive. Now we generally have that experience across all computers and computer-like devices. It's awesome.