The reason Apple moved to the USB-C charging on the MacBook is because it no longer served the purpose it was originally for. Older MacBooks and MacBook pros were a bit bulky and heavy. Tripping on a MagSafe charger cord connected to one of these would disconnect because the friction of the laptop on its its surface was stronger than that of the magnetic pull of the MagSafe connector.
With the new Macook, however, I believe it was much lighter to the point that it would have pulled the laptop down with it upon someone tripping on the cord. It wasn't doing anything to benefit the user at that point. Because of this, they probably opted for a slimmer charging port (USB-C), and it went well with the growing use of USB-C in the industry.
I do wish they included more USB-C ports, however.
I do not know exactly the reason they opted for USB-C in the new MacBook Pro, however. I believe it would still be heavy enough for MagSafe to be effective. However at this point, USB-C is saturating the market and consolidation in their products may be a more important issue for Apple at this point.
With the new Macook, however, I believe it was much lighter to the point that it would have pulled the laptop down with it upon someone tripping on the cord. It wasn't doing anything to benefit the user at that point. Because of this, they probably opted for a slimmer charging port (USB-C), and it went well with the growing use of USB-C in the industry.
I do wish they included more USB-C ports, however.
I do not know exactly the reason they opted for USB-C in the new MacBook Pro, however. I believe it would still be heavy enough for MagSafe to be effective. However at this point, USB-C is saturating the market and consolidation in their products may be a more important issue for Apple at this point.