If you have a good WiFi network at home, that's great when your laptop is at home, but if you carry it outside your home you are at the mercy of whatever infras

If you have a good WiFi network at home, that's great when your laptop is at home, but if you carry it outside your home you are at the mercy of whatever infrastructure you find there. Usually if you need to transfer large amounts of data you can still plug in an Ethernet cable in e.g. an office.