iOS manages RAM use impressively well. These Apple devices are powerful and can perform well into 3+ years for most users. Hardware is "chased" more often than "mastery" of software. I gave my 12.9 IPP to my daughter because she draws anime characters and bought the 9.7 IPP for myself. I can make better use of the 9.7 IPP size. That 12.9 IPP is a big sheet of glass to carry around and I'm thinking about getting a Thule hard case for it. 4GB of RAM and USB 3 port speed are certainly desired, but I'm not "pushing" specifications to the limits. I chose the 128GB storage size and will use iCloud if more storage need.