I have hazy memories of unleashing the power of PowerPoint. Just as VBA provides a whole IDE baked into a vanilla install of Office and thus leapfrogs any question of 'why', so PowerPoint packs a box of almost limitless publishing potential - it's got layers (sort of), it's get transparency (and a very nifty 'remove background' tool), it's got an undo button, it can export to multiple formats, it can even do animation (with sound!), it can do more! I'd wage a few cookies on PowerPoint.