They didn't "replace" the Ethernet with WiFi. The WiFi was always there. The Ethernet port was for people who _needed_ to plug into an Ethernet socket. If you

They didn't "replace" the Ethernet with WiFi. The WiFi was always there. The Ethernet port was for people who _needed_ to plug into an Ethernet socket. If you still have that need, WiFi doesn't replace that. So now you're in a situation where you _need_ to plug in an external adapter every single time.