In Europe it's intolerable - it's much nicer in the US with 25 cents being the max denomination for a coin.
There are coins of Half Dollar & Dollar in circulation.
There are. And you hardly ever see them. On the rare times I was given a modern dollar coin in change, the cashier usually apologized for giving it to me because most Americans don't want them.
About the only place you ever got them was toll booths, since they were government operated. Those are mostly gone now too…
I have been on both sides of counter, (data point only one) I have been happy to accept and give it just like any other coin.
Yeah, once every 6-12 months and then you say "neat" and put it in your special coins cup.