because I have one nano-sim slot in my phone, and yet have multiple linesIt is also great if I am abroad and my data is limited, just quickly add nother e-sim, from a local provider and boom cheap data. e-Sim is great.
But that's Apple's fault for only providing the dual physical SIM in China. It's not eSim's merit.
I recently bought a $120 Android phone (19% VAT included!) for testing purposes and they could afford to put a dual sim tray in it... poor Apple can't.