Do I need a link cable with the Oculus Quest 2?

My answer is No, No, No!

Using Virtual Desktop to stream SteamVR over WiFi to Oculus Quest 2 will give you a much better performance. Actually it’s even much better than with Oculus Rift S. I tested Rift S, Quest 2 with Link cable, and finally Quest 2 over WiFi. The third was way way better.

Please see my below post: