It won't happen because Linux users like it the way it is. It is consistent, it's just not the way you want it to be. I love middle click paste. It makes sense that it doesn't follow the text cursor because the mouse is separate and this adds extra flexibility. Ctrl+A should select everything and put the cursor at the end.

Actually, in some apps the cursor disappears and in some the cursor goes to the end, but the behavior of what happens when text is selected is always the same.