That's rather missing the point though. Activating the user's eSIM while they are international allows them access to their domestic number, but you're paying immensely for international roaming. Having the use of eSIM and multiple SIMS allows the user to buy an eSIM card for the country they are in and getting a local number there, thereby avoiding the international roaming issues and costs someone would have.
A friend of mine and her husband just spend 9 weeks going through the US on business from Australia, and instead of paying the international roaming, they bought sims here, used local numbers here, then shut them down when they went home, and went back to their number down there. Tons cheaper than keeping their Australian line going while overseas.
BL.