This post seems like spam to me. This has been discussed so many times in the thread and outside of it.
Because storage isn't like the cheapest component in a computer.  

Please read other posts first. Although I can't blame anyone, the thread has been going into circles for more than 100 pages. The useful posts would only take a few pages combined.
Increasing the limit to 20MB does not mean that we will instantly have 20MB blocks.