As far as I'm concerned Wifi is a "solution" for lazy or incompetent people outside of mobile devices (who do really need it to be useful). Network cable is cheap, crimper is cheap, creating a simple network in your house is mostly a trivial matter.

I have helped some people who had many troubles with wifi devices (particularly printers) and when then didn't want to run a cable to solve the problem forever I told them to fuck off. If there is one thing that is certain with wifi, it's that it will break at some point and randomly show poor performance/issues. Anything that doesn't have to be absolutely wireless has to be connected that way, problem solved, forever.