DF cares much more about frame timings, not necessarily framerate. In many of their videos they praise games which achieve a locked, stable, hitch-free, 30fps. In some cases, frame time stability can be almost as important, or even more, than absolute average framerate.

Especially when Unreal has been infamous for shader compilation stutter, where even a on-the-surface 60fps average can feel terrible due to inconsistent frame timing and hitches.