You and I will have to agree to disagree. I'll cede that a person's disabilities, or life circumstances will limit their skill in a video game. Beyond that, though, a person's only limit is how much they themselves want to improve. Two years ago, I could barely handle an Extreme primal. Today, I'm an Ultimate clearer. If I just pretended I hit my limit two years ago, I never would have pushed myself to find this new peak.

For the sake of argument though, I don't think anything outside of Savage is any kind of cliff that can't be scaled.