system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why, if your internet is above average, will people still suggest wired over wireless?

I have a consistent 28 down 8 up, and am wondering if I should route an ugly Ethernet cord from the kitchen to my computer. Will I see a big enough performance increase to noticeably reduce lag in video games?
gpt
Wireless is a shared medium, meaning that if you have two devices associated with the wireless access point, they have to use the same radio waves over the air to communicate. To reduce mid-air collisions where both (or more) devices need to transmit data, a method called RTS/CTS is used. The acronym stands for Request To Send / Clear To Send and is somewhat self explanatory in that when a device needs to send something, it has to ask the access point if it's cool to send. When the access point has the cycles to allow the device to send, it will reply with an all clear. This, along with the nature of radio waves' and their susceptibility to interference from objects that the radio waves can bounce off of, other wireless networks operating on the same frequencies (channels), and microwave ovens, ultimately reduces the reliability and real time communication performance overall. Compare this with a wired connection where collision avoidance is non existent and interference on the wire is negligible since the wired connection is dedicated to the device connected. 

Edit TL;DR - you will see noticeable performance increases for interactive applications like video games if you wire it up since wired communications aren't as fragile as wireless ones.