I think it falls under the "eliminate any and all possibilities for malfunctions while playing live" department.
As good as wireless technology has come, there are still issues with interference and loss of signal. With a good cable, you know it's going to work, unless you trip over it and pull the plug.
As good as wireless technology has come, there are still issues with interference and loss of signal. With a good cable, you know it's going to work, unless you trip over it and pull the plug.