I wouldn't have guess such small amounts of radiation in the atmosphere would interfere with carbon dating, but I know literally nothing about how it works. Seems like solar radiation and such would be a bigger contributor?
Check again. "The USB Type-C Specification 1.0 was published by the USB Implementers Forum and was finalized in August 2014." (https://en.wikipedia.org/wiki/USB_Type-C)
Why? Oh why?