I use stepping to design "error amplifiers". Actually many different types of amps.
With an error amp I need phase shift at several different points. Some components effect two points while some effect only one point so the interactions can get complicated.
Years ago in school it took hours/days to design a complicated error amp or multi stage filter. Not in school, I converted all that to a spread sheet. It really sped things up.
As soon as I got an affordable SPICE things got much faster. (with stepping)
Need 6db/oct role off at 20hz. I think the cap is between 1 and 4.7uF but don't want to "think".
In 1 second I get a curve for each value. So 3.3uF looks best.
With ".step param X list" you can do some interesting testing.
Example, I know that most transistors run "fastest" at a certain current. Lower current levels there is not enough energy to drive the capacitance loads and at too high current the transistor's gain drops. By stepping all the resistors in the amp together you can get a curve for 1mA, 2mA, 3mA.....10mA. This is another way to get bandwidth verses collector current of the transistor.