My floor threshold on my Rubicon is 24", which was a challenge for both my wife and I. I installed the Rough Country retractable rails and it works great. They replace our rock rails which I will never need.
I have no intent to remove anything. I purchased the Gladiator to replace my F350 flat tow vehicle and my 1967 Polaris RZR I used to ride the Colorado OHV trails. The Gladiator will provide a better environment vs. exposure to rain, sleet, dust, and mud in a RZR.