...or How I learned to hate Wi-Fi.
Truly, Wi-Fi is the Spawn of Satan. If or when it works OK, then it's OK. But trying to fault find a dropping wifi connection is like trying to shove toothpaste back into the tube. At least with Ethernet you can swap cables and easily swap out other components, routers, switches etc but with wifi it's hopeless. Is it the router ? Is it the computer? Is it intermittent? Is it some knobhead messing about in adjacent houses with a jammer?
After wasting all night trying to migrate data from LOML's iMac to her new MacBook Air, I've given up. The connection drops intermittently but the Migration Assistant doesn't recover cleanly either. So the transfer is halted and you have to start all over again....."This will take 7 hrs and 4 minutes"
USB3 to Ethernet adapter now on order.
Decision made to flood wire the new house with Ethernet cables.
Sod Wi-Fi