In my business's work flow we engrave designs into granite. Unlike print images our designs have a hard limit our artwork cannot go below. This includes the minimum height and width of a given path, as well as the space between objects. There's a script file available on the net that can accomplish something roughly equivalent to this but it's not supported and every new version of Illustrator threatens to break it.

A feature like this in illustrator where object scale and spacing could be a selection attribute would be very helpful!