I'm typing on the highest end MBPr you can buy, but my first computer was a 286 with DOS and a handful of programs - this was just after Windows 95 came out, so it was quite shitty for the day. However, no computer has been quite as magical as that one. While I get paid good money to produce code every day, and I think it's damn good code, I don't feel nearly as productive as I did when I was learning to write QBasic and batch scripts for the first time.