Well, just about anyone would benefit from having an SSD.
Prosumers in particular will definitely benefit from having a blazing fast disk that holds their precious games, video editing tools, hidden p*rn folders , or just about anything they regularly use and want to have fast access to.
For me, an SSD would be the safe have for my small game collections, replacing that old HDD that just won't die... (I'm waiting for it to die to use as an excuse for buying an SSD, yes I'm lazy )