I thought 8.3 was supposed to fix wifi. It didn't fix crap. My wifi randomly decides to switch back to LTE at random times. When I go to the wifi menu, my home network is right there on the list of available networks, and I have to manually select it to make it connect again. Totally unrelated, but my MacBook Air on 10.10.3 also many times won't connect to wifi right away when I wake it up. These people are working on a damn car but still can't master stable wifi connectivity. The software updates are placebos and don't do anything.