Bear in mind that the new MacBook also charges over the Type C connector—so, in the case of the $19 adapter that gives you a single standard USB connector, you can choose to either charge your laptop or connect a peripheral, not both. Even with the $79 adapters, if you want to keep your battery topped up, you only get a single USB port for expansion. This means that if you want to plug multiple USB devices into your new MacBook, you’ll need a daisy chain of dongles and hubs.
— Ars Technica’s Sebastian Anthony: The new MacBook: I hope you like dongles