After I got into my friend's modded-out car, we had to slow to walking speeds to exit the parking lot because it would bottom out on the curb cut. The same happens with speed bumps. Large rims get damaged on potholes that a normal tire and rim combo would just shrug off.
Add a few years to your life and you don't want to crawl and duck into a low car anymore. Stiff suspensions are hard on the back and joints.