There's a story today on WCCFTech--so, you know, the usual caveats--that the USB-C ports have moisture sensors in them, with a reporting daemon, and, it being that site, a suggestion that tripping the sensor would cause Apple to deny warranty claims.It is, but they’ve expanded Apple Care to cover just about anything from natural failure to “Oh Shit! I just dumped my coffee all over it!”.
https://wccftech.com/apple-macs-usb-c-ports-can-now-detect-liquid/