Noise and Interference caused by high-speed digital switching and radiated RF signals can be eliminated by appropriate RF shielding and careful PCB design..
Every now and then an unusual application for EMI/RFI shield configurations can arise which might require some lateral thinking to solve the problem..
Does one design for functionality, manufacturability or accessibility? This is the traditional argument between the design engineer and the fabrication workshop. Try desoldering 5 or 6 small EMI/RFI shields assembled onto a tiny PCB and the answer to the above would be obvious..
Dedicated three-dimensional laser cutting technology on an existing standard RF shield as a complementary manufacturing station for a shelf product..