My old Mac Pro has 32 gigs but the SSD makes the Computer way more fun. Since Yosemite my Mac takes longer to boot and open apps and I run everything from striped arrays with Raid 5 backups. If it were easy I would downgrade the OS to Mavericks.
I have a G4 Mac Mini running Classic with 1 gig of Ram, it pops open window and apps so fast that Apple should be ashamed of the new machines that always require more speed memory or disk space.
128 meg upgrade for my old pro are only about $1,600.00 :)
What I’m pissed about is Yosemite killing trim on SSD’s. I’m still on Mavericks because of that.