I don't have a source but owned MBPs and Airs from the first up until USB-C, and I had more than 3 different power adapters including USB-C for them. But you ma

I don't have a source but owned MBPs and Airs from the first up until USB-C, and I had more than 3 different power adapters including USB-C for them. But you may be right and I remember differently. But I might confuse those with display adapters.