You step off the plane at Maryse Condé Airport in Les Abymes. You need a taxi, a map, or your hotel address. With a MegaEsim plan, your phone already has data the second the plane doors open. You set it up at home over wifi, and it switches on by itself when you arrive.
Compare that to the old way. The Orange shop at the airport can cost a small fortune for a tourist SIM, and you have to queue, hand over your passport, and wait. Pocket wifi means picking up a device, paying a deposit, and carrying a second gadget that needs charging. The eSIM skips all of it. There is no plastic card to swap and nothing extra to carry.