My posts have three tag lines and the last one is "WiFi is for convenience, hardwired is for performance.". After I hard wire APs, my customers get the message but before, it's a battle over "Why does it work so slow? vs cost, then most say "Wow! This is really fast!" or "Why don't I have problems, like I did before?".
Ever work in a building with wire lath & plaster or actual Faraday Cage shielding? I did a house with wire lath and the homeowner told me they wanted to use WiFi everywhere. I said "Good, for you", then explained why that would be difficult if the devices weren't hardwired. The network was OK, ATT's U-Verse crap caused all kinds of problems.