Most studios are moving to digital. A ethernet stagebox (normally Dante, but there are other options) where each performer is, connect to your network. Just run an ethernet jack and power to various locations where you might want something and plug in what you want. You can get in-wall versions of the above to use in places where you will always have a lot of stuff connected.

You still have the mic cables on the floor, but they are going to be there all the time and the ones that change most often.