Pick based on device and itinerary
eSIM is usually the lowest-friction option for compatible phones, while SIM Card remains useful for older hardware and removable backup.
Pocket WiFi can serve groups, but it adds another device to charge and carry.
Roaming is the simple fallback, not always the best value
Home-carrier roaming can be convenient, but the pricing and speed tradeoff is often weaker than a travel-specific data plan.
For longer trips, the difference usually becomes more visible.