eSIM in iPhone XS

One of the features introduced with the iPhone XS was eSIM. eSIM is somewhat similar to Apple SIM on cellular-enabled iPads. However, it's specific purpose is to allow iPhone users to have two numbers on their one iPhone. What good is this for? The most realistic case is that you frequently travel to another country and have a dedicated plan and phone number in that country. With eSIM, you could have one iPhone and receive phone calls from both numbers. You also can use a local data plan while in another country with eSIM. Currently, there are only a handful of carriers around the world that support eSIM, but it will sooner or later catch up. While iPhone isn't the first one to implement an eSIM, it's another big push to get more carriers on board.