>>3877166Because you are not thinking; I have this great idea but it requires a 4x5 film camera. 
You are thinking; ooooh looook at that, wow I soooo want that .... mmmm surely I can think of something to use it for ... 
But, as anon says, you won't.
If people spent as much time and money thinking about and researching subjects as they do on gear they would shoot much better photographs.