Is there any effort towards enabling increased privacy against tracking by "rotating" eSIMs amongst a group of individuals? The article mentions capacity for 50 profiles, what would be the legal and/or implementation effects of such a Local-Profile-Agent?
You can't transfer eSIMs between devices. iPhones support "transfers" but in reality it involves the carrier reissuing it. You'd have to transfer the physical device, which is going to be a pain.
>Is an activated eSIM linked to the device's MAC address, making it impossible to use with a different device?
After an esim is "activated" it's bound to the esim chip. By design, you can't copy it onto another esim chip or device. If you want to transfer devices, you need to ask your carrier to issue you another esim.
That should work, as "physical eSIMs" are usually not bound to the device they're in in any way. Your provider might restrict the set of allowable IMEIs conencting per SIM (profile), though.
That's not quite true: Some eSIM profiles can be reinstalled, sometimes only on the same device, sometimes only on a limited number of devices or a limited number of times, but sometimes they're really as versatile as the physical SIMs they're replacing.
It's ultimately up to the provider which model they choose, but I really like the ones that allow both reuse of an existing profile and make it easy and free to provision a new one if required (e.g. due to a lost or broken device).