> updates products two or three times a decade Just the overall design — there are substantial internal updates (silicon, battery, etc.) every 12-18 months for

> updates products two or three times a decade Just the overall design — there are substantial internal updates (silicon, battery, etc.) every 12-18 months for most lines. Air had been waiting a while, though. > heavier (and has more ports) ... I suspect this is because Apple gives so little attention to Mac now A simpler explanation: There's a market for a laptop somewhere between MB and MBP.