Joe Rossignol, for MacRumors:
Japanese blog Mac Otakara believes that 2019 models will stick with the Lightning connector as a cost-saving measure.
Based on its conversations with various accessory manufacturers, the blog also predicts that 2019 iPhones will continue to be bundled with the same old 5W power adapter, forcing customers to spend extra if they want a faster charger like the 18W USB-C version that ships with the latest iPad Pro models.
I’m already invested in USB-C in 2018 so I won’t be interested in a Lightning iPhone or Lightning AirPods until they make the switch to the newer standard. Also, the iPhones really should get the 18W charger in the box, while the iPad Pros should get a 30W charger — they can actually use it.