+1 to all accounts. I didn't have anything to add until this tin foil theory: I am using a smaller Moto modem with older airport express as router. 2016 tbMbp running boot camp on external t3. Same issues on 2.4 and no connectivity on 5- I thought it was my set up. I'm out and about and needing to connect to a wifi network and as an xfinity customer they let me mooch any xfinitywifi. Log in. No disconnect. Curious so I Tried at home. Neighbors have xfinity, same deal. Not one disconnect. 2 more times different areas and same result. So yea- I'm just wondering if maybe it's not a driver issue but a router setting? I wonder if Everyone from this thread was using their own router or those that volunteered the models just seem to follow same issues. could different routers settings be the cause compared to the ones companies like xfinity offer?