https://www.techradar.com/news/iphone-xs-will-boost-esim-shipments-to-420m-by-2022

It is predicted the inclusion of eSIM technology in the recently-launched iPhone XS, XS Max and XR will catalyse the market and lead to 420 million shipments by 2022.

eSIMs are a fixture of cellular-powered Internet of Things (IoT) networks, allowing devices to switch networks without the need for a physical intervention.