The elimination of MagSafe is nearly too painful to talk about. It was magical. Now it’s dead. Here’s how it worked: The power cable was magnetic. Instead of sticking into the laptop, it connected to the side of it. If someone tripped over the cable, the cable would harmlessly disconnect from the laptop. That feature was really removed? I've accidentally yanked the power cord multiple times on my laptop. MagSafe save…
In my experience MagSafe 2 ruined the MagSafe connector design. It’s nearly impossible to use MagSafe 2 in anything but a stable flat position. Forget using it while laying down.
Also, I work in a metal fabrication workshop, which means the brass contacts and their housing on the laptop side of the MagSafe 2 connector on my MacBook Pro are now blanketed and burned from poor contact due to metal dust interfering with the connector.
There are aftermarket MagSafe type connectors for the new MacBooks. This is a superior design in my opinion because it makes both sides of the connector replaceable.