What fascinates me about iSIM is IMSI switch. Basically a SIM in an integrated SoC chip. IIUC..

- primarily IoT for now, smartphones later

- with eSIM easier to switch between providers, with iSIM it is supposed to be possible to be connected to multiple at the same time

- the advantage is supposed to be the identity in Secure Element

- and then the marketing fog of security mentions

So what are the security&privacy benefits?

https://www.thalesgroup.com/en/markets/digital-identity-and-security/mobile/connectivity/isim

https://trustedconnectivityalliance.org/technology_overview/integratedsim/