WiFi isn't available everywhere. Even when it is, it can be pretty unreliable or require you to enter information into sketchy captive portals. In general, for

WiFi isn't available everywhere. Even when it is, it can be pretty unreliable or require you to enter information into sketchy captive portals. In general, for a mobile computer, mobile data is quite useful. If you only use your laptop at home, then it's not terribly useful. But then at that point you might be better off with a desktop computer.