Printing new $1 bills cost a lot more than stamping $1 coins... coins last a LONG time, bills do not...
At the end of the day, if the gvmt stops printing $1 bills, we will be using coins... in England, you have a 1 pound coin (where is that 'pound' symbol?), a 2 pound coin and a 5 pound bill... I do not know when they got rid of the lower ones, but it works out... but I did hate having so much weight in my pockets... they were heavy...
I can see us going that direction in my lifetime... and also getting rid of the penny...
Now, on the flip side... (and this is from the news, not experience)... Japan still has coins... the yen is like our dollar... so even though one yen is like 1 cent, they have coins that split it up... I wonder why (if this is really true)....