They certainly don’t come with anything nonessential anymore.
Now, Apple seems to cut corners where ever possible; as someone else mentioned the power brick no longer includes an extension cable. To make matters worse, the USB-C cable they do include is a "power only" cable and won't allow you to hook up other things to your MBP. This means to hook up your monitor to your new computer you have to remember to purchase a "real" USB-C cable.
This is on a product that costs thousands of dollars! Can they not afford to provide a usable set of cables with your $2,500 computer?