AFAIK, the only 'improvement' is that it takes up less physical space.

you are supposed to be able to have multiple, 1 or 2 of which can be active, and switch between them whenever you want.

but afaik that's only possible on rooted phones with openeuicc or another app like it, because by default only google's own app is allowed to handle esim configuration, and that has limitations in what it allows.

When traveling you can pre-purchase an E-SIM and already have it loaded to your phone in advance of landing - avoiding the whole airport SIM purchase shuffle, or he holding off on using your phone until you get to a convenience store, etc.

I use an E-SIM for my personal plan, saving the physical SIM for a work line.

It's not a physical SIM—the E