If the design and testing of physical objects occur in silica, I wonder if by picking up the speed and iteration of software, they'll also pick up the size, sco

If the design and testing of physical objects occur in silica, I wonder if by picking up the speed and iteration of software, they'll also pick up the size, scope, and complexity of software. While doing software dev has its advantages, there are well-known disadvantages as outlined in classics like the mythical-man month. Will physical dev pick up the same disadvantages? Or is there some constraint on designing physical things that help contain complexity?