It was about 20 years ago when we in the UK switched from pound notes to coins. Everyone moaned about the new coins (too heavy, too easy to lose etc) and then quickly got used to them.
It annoys me now that I never collected all the different designs on them - they were money after all and I had things I needed to buy! But as I'm sure any Brits or collectors of world coins knows, there have been plenty of different designs over the years.
If the US Mint did ditch the dollar bill then I'm sure coins would become accepted, and we could all enjoy new designs over time. And the US would have one less almost-identical banknote denomination!