@kazani
The correct future would be eSIMs downloaded onto removable eUICCs. Sadly, adoption of removable eUICCs only gives a signal to phone vendors through carriers that "eSIMs are getting more popular", ending up in reduced number of physical slots on devices.
https://arstechnica.com/gadgets/2025/12/i-switched-to-esim-in-2025-and-i-am-full-of-regret/