Slider hitch necessity?

I have a short bed, non slider and a standard front end 5er. Never needed a slider. When you are backing, you will get to an angle where you are just pivoting the trailer. This will happen well before 90 degrees. Go into a parking lot and see what it takes to get your cab in danger of touching the trailer... I think you'll be surprised at how far you can go, and how much you'll never need to get the rig to 90 degrees.