Having the easy option to go wired and defaulting to it for non-mobile use cases may save you a lot of consternation.
My experiences are similar to the authors, and I found them puzzling, since I had spent time and money on building a 2-node wifi network with wired back haul which was capable of sustaining 300mbps. Through my troubles, I learned that USB 3.0 can cause interference with wifi too, e.g https://link.medium.com/3SNxNPAWx7
My life got easier once I adopted the policy of "if it ain't moving and can be wired, wire it".
This has the benefit of freeing up bandwidth for the things that must be wireless.