The need to enter into security agreements directly with device manufacturers that use eSIM chips. However, large companies like Apple will not make any concessions or changes just for the sake of the legislation of individual countries.
Certificate revocation capability. Since the authenticity of the security certificates used will be confirmed by foreign centers, in the worst-case scenario, you can simply disable all eSIMs.
Potentially dangerous code. No one guarantees that gadget developers will not embed any code into the eSIM chip to collect user information, including call history, messages, and location.
In addition, possession of cryptographic keys will allow you to spain number data clone a user profile or even eavesdrop. That is, your SIM card can be stolen remotely - it is difficult, but quite feasible.
The emergence of eSIM has caused a problem with user identification. In some countries, SIM cards are purchased with a passport, but how then to realize the main advantage of eSIM - the ability to get a number without leaving home? In some countries, the user needs to provide a sample of his voice and a photo. With the widespread use of the built-in SIM card, you will have to forget about "gray" SIM cards and at least some anonymity. Of course, for law-abiding citizens this is not a problem. Right?
Conclusion
eSIM technology can be roughly compared to virtual reality. Yes, there is already a range of advanced VR headsets and a fairly large selection of games on the market. However, virtual reality will not soon replace the usual mouse and keyboard.
The situation is similar with eSIM - more and more gadgets with support are becoming available, and major operators offer connection without the need to visit the office. But customers still do not see a special need to switch to a built-in SIM card, especially in the absence of a gadget with an appropriate chip.