Through all it's faults and problems, I can't shake how good my 2015 MacBook Pro has been: great keyboard, MagSafe, good enough everything, great keyboard. Did I mention how great the keyboard is? It's on my lap right now, purring and tethered to power as usual.
The new magsafe uses a normal usb-c power brick with a special charging cable. The cable has a usb-c plug at one end and a magsafe plug at the other end. So it should be intercompatible between chargers now, and there shouldn't be any more need to buy a new charger when the cable frays. (And apparently you can also charge with a normal usb-c cable in any of the regular usb-c ports).
I'm quietly hoping they might be able to run data through that magsafe port too. Being able to have a small usb dock which connects over magsafe would be sweet.
This sounds better than having your laptop's power connector internally damaged rendering your laptop unchargable just because your charging outlet was on the wrong side or your dog wanted to step on the cable.
I could not keep my 13" MacBook plugged in while using it on my lap. The MagSafe cord repeatedly fell off when my leg, or a pillow bumped into it. My MacBook MagSafe port had black marks on it from arcing. At least three times I couldn't get it to charge because a metal fragment (once a folded paper staple) became magnetically stuck to the receiving side. On one of those occasions I couldn't fix it till I got home and grabbed some tweezers.
It was a smart solution, but IMO to a tripping problem that wasn't widespread.