In a class act, and one for which MPG claims no credit in spite of pointing out how cheap it felt, Apple has dropped prices substantially on most of the USB-C adapters and cables needed for the new 2016 MacBook Pro, which has Thunderbolt 3 / USB-C ports.
I called Apple support for my own order of various adapters. Apple issued a refund—but it looks like another conversation is needed because only $20 was refunded, and it seems that the refund was for only one item rather than all four items ordered.
It’s good news that the adapter cost has come down considerably. For example, the Thunderbolt 3 (USB-C) to Thunderbolt 2 Adapter has dropped from $49 to $29. That’s much more palatable.