We now have another attempt at getting us to use $ coins instead of bills. Will we do it. I doubt it unless we are forced to.
I remember in Britain when the first Pound coins came out, no one liked them for a variety of reasons (the same as here). Then, all the vending machines started taking them and we needed to have them for buying rail tickets, parking permits, etc. as well as for food and beverage machines. Up until this time the vending machines only took coins, not paper money. Suddenly, it was much easier to use coins in bigger denomination instead of loads of small coins and everyone started liking them.
I feel that one group will like them - the blind. They can at last have a $ to use that they know is a dollar and nothing else. I have no idea how the blind manage here as all bills are the same size. In other countries, the bills are different sizes so that the blind can tell which is which. I expect that they would like a $5 coin too.