2008 is when Apple's trackpads got full general multitouch support. (Prior to that, they supported 2-finger scrolling.) The 2008 MacBook Pros still had a big ba

2008 is when Apple's trackpads got full general multitouch support. (Prior to that, they supported 2-finger scrolling.) The 2008 MacBook Pros still had a big bar as the physical button, but later that year they started introducing the unibody MBP with the entire trackpad as a physical button hinged at the top. In 2015 they introduced the Force Touch haptic trackpad. As far as I can recall, all three generations of trackpad have basically the same cursor motion behavior and similar sensitivity.