I'm wondering if it would be possible to have the Upload function in the Messaging App mirror the functionality of the Upload function in the Email App.

Namely, I would like for the "documents/other" button to be enabled in the Messaging App so that one can send doc/pdf/other files via MMS to friends.

I think this functionality could be very well received, and it is certainly something I miss greatly from my Samsung dumbphones (literally able to upload any file type due to full file browser).