Jason Snell on the MacBook:

At some point in the life of the MacBook, Apple seems to have gotten the message that it wasn’t the solution. (My guess is that Mac buyers sent the message by continuing to buy MacBook Airs—complete with MagSafe and familiar USB-A ports—despite Apple’s attempts to sell them fancy USB-C Retina Macs that cost hundreds more.)

Whatever the reason, the MacBook is gone and that’s not a bad thing. Apple did what it does best in most situations like this—it cleaned up the product line so it’s easy to understand, allowing people to buy the product they need.