Indeed, RAM. I have a two-year-old MBP that has 16 GB. I have an almost five-year-old ThinkPad that has had 32 GB since the day I got it. My workstation has

Indeed, RAM. I have a two-year-old MBP that has 16 GB. I have an almost five-year-old ThinkPad that has had 32 GB since the day I got it. My workstation has 128 GB. Actually, I should just sell the MBP. I've probably used it two or three times -- and for maybe two hours altogether -- in the last year or so.