Dac hookup....

Shouldn’t be if your Wi-Fi is stable enough.

I prefer to use a wired connection wherever I can. Sometimes because of distance and access restrictions I need to go wireless. For Pandora background music I have a wireless connection but for Tidal MQA hi-res I use a wired connection. Every system is different so try both and see what you prefer with your own ears.

I like the mcgal comment, same practice here. I hard wire everything, only thing wifi around here are phones and the wife’s laptop. It is dependent on your router, no doubt, but think about that person who games online with a wireless controller. Wireless will always have a lag compared to wired...*grinz

For the best steaming results, you should ALWAYS use an Ethernet  wired connection.  I also suggest you check your modem and router to ensure they are working okay.   Several years ago, I discovered my router was dropping packets especially when streaming Tidal.