Yes, Cage's World is a wonderful time-capsule of early RB.

"There is no doubt that Red Baron provides an excellent sense of where you are in relation to the ground and other objects."

This was true from the beginning, as crude as the early non-Glide terrain might seem. The sense of space, the ease of orientation was outstanding, compared, for example, IMO, to Rowan's Flying Corps. I played RB initially with an OEM 4 mb graphics card. 3dfx cards were very expensive in those days, and of course "Glide wrappers" were unheard of. Later, when Glide went out of fashion, I acquired a Voodoo 2 cheaply and was able to enjoy the 3D effects.