When you land at Cadjehoun Airport in Cotonou, you have a few ways to get online. You can hunt for a Celtiis, MTN or Moov kiosk, show your passport, register the SIM and wait. You can rent a pocket wifi box that you have to carry and charge all day. Or you can leave your home plan on roaming and watch the bill climb fast.
The eSIM removes all of that. You set it up before you fly, then it switches on by itself once you reach Benin. There is no line, no language barrier at a counter, and no spare gadget to lose. Your normal SIM stays in the phone too, so you keep your home number for calls and bank codes.