DC is researching phone SIM options for a 40 day trip to Thailand & Vietnam. His phone is not compatible with an eSIM. A local physical SIM would be cheapest, but as he'll be arriving in Bangkok in the evening, and needing to get a bus and find his hostel, he doesn't want the inconvenience of also hunting around for a SIM on arrival. Is it fair to assume they will not necessarily be good value in the airport shops?
If you pre-bought a physical travel SIM for a similar trip, which did you choose, and were you pleased with it?