I'm not sure about what you mean. The asset store is great but only when it is about content. When you want universal features like SSRR, you need to have them from unity themselves because a third party won't guaranty it work on the next update. As a professional, I can't rely on anything from the store if needed for more than my current project. For example, I found a solution to make a mirror, it worked well with previous Unity versions but not on 5 and I can't do anything about it because it was made by someone who posted a script on a forum. This is a kind of feature that should have been build into the engine instead of relying on the community good will.