[JKT]

I would say probably not as it would most likely conflict with the ability to pick the download folder on a domain specific basis. E.g. all images I download from NASA go to a JPEGs folder which is used to rotate my desktop. If this feature was added, then I would lose that specificity (and I would also end up with hundreds of dated folders). One way around it, I suppose, would be to only use dated folders in the default download folder and not in any site-specific ones but that just adds a level of complexity that might not be easy to follow.