Mersey,

You are incorrect.  You are 100% incorrect.  There are a number of scripts that support uploading very large files with limited PHP memory allocations by means of performing block uploads of a file.  Each block is a defined segment size of the file to be uploaded.

As for your comments about shared hosting and VPS... Well, please don't assume.  I actually have my own systems in a colo.  Just because I can allocate 32GB of RAM to a VM for UNA to support large file uploads does not mean I want to do so.