You don’t hear anything about ramdisks these days. What with intelligent OS file cacheing, we don’t really need them. Back in Amiga days, though, the RAM: drive was blisteringly fast. You’d put your small files there, and you could move them around really quickly.
Third-party ram disk drivers added features like the ability to survive a reset, and be more dynamic than C-A’s offering. The ASDG Dynamic Ram Disk was written by Perry Kivolowitz, who went on to win an Oscar for digital rendering techniques.