It takes me 30 seconds from buying an eSIM in any country worldwide from their app, paying with Apple Pay, to having it active and working with data and voice line.
I travel a lot and before it'd take 15 minutes to sometimes an hour of driving to a phone shop or finding it at the airport, getting your passport copied (fraud risk), getting foreign money in cash out to pay, and handing a stranger your phone.
Big improvement for me. And I can run 2x eSIMs at the same time!