So in steam, when you go into the properties of a game, there is a DLC's tab. When you select/unselect DLC's, it will often trigger a download to happen (althou

So in steam, when you go into the properties of a game, there is a DLC's tab. When you select/unselect DLC's, it will often trigger a download to happen (although small). With Dota, they deliver support for OpenGL & Vulkan basically as DLC's. So the mechanism to have modular game delivery already exists in steam, they can just repurpose it and give it a different label, or bake the options into the Install dialog so you can choose the parts you want upfront. And yeah, other launchers are a pain (with proton), I agree.