VBOs are really pretty easy to explain though, no? "Look your GPU probably has 1 or 2 GB of its own VRAM, so there's no way we would upload many polygon meshes

VBOs are really pretty easy to explain though, no? "Look your GPU probably has 1 or 2 GB of its own VRAM, so there's no way we would upload many polygon meshes every frame via 10000s of individual glVertex calls, so just assume something as silly and useless as glVertex doesn't exist to begin with."