Why is USB-C replacing Lightning?

Why is USB-C replacing Lightning? In simplest terms, for compatibility, ease of re-use, and particularly reducing electronic waste.

Apple replaced Lightning with USB-C for iPhone with iPhone 15 in 2023.

Prior to the use of USB-C at Apple, Lightning was in use from 2012 to 2025, having replaced the 30-pin in use from 2003 to 2014 or 2016.

USB-C is not particularly new at Apple. Apple started incorporating USB-C connections on Mac in 2015 and 2016, with subsequent Mac models offering faster USB-C and Thunderbolt connections, all with the same USB-C connector.

Why are vendors including Apple changing to a new USB-C cable for charging, and for other functions including data sync?

Much of this equipment shift is due to regulations in the European Union. Specifically, this: The EU's Common Charger Directive was approved by the Council of the EU in October 2022. Manufacturers were given a transition period to adjust their designs and ensure compliance. From 28 December 2024, the rules apply to mobile phones, tablets, digital cameras, headphones, headsets, videogame consoles, portable speakers, e-readers, keyboards, mice, portable navigation systems and earbuds sold in the EU. From 28 April 2026, they will also apply to laptops. 

While USB-C does have issues around distinguishing different cables and differing protocols and differing wattages, a path that reduces the myriad of completely incompatible charging schemes across use in Europe is laudable. A path that incidentally also reduces that same cabling and charging mess and electronic waste created elseworld is nice side effect of that European regulations, yes.

Information on common Apple connectors: Identify the ports on your Mac - Apple Support