They are only copper coated since 1983. Mostly zinc with a thin copper coating. 1982 and previous was about 95% copper. I really wouldn’t miss them, and saving them to roll and cash in is a pain. Takes a lot of time to make .50. Roll a $10 roll of quarters in much less time. I say bye to the penny. Of course there are millions in circulation and will be for a long time.
Unless your local bank demands it, I just take them to the change machine at my credit union or the Walmart - no need to roll them anymore.
My credit union does it for free, Walmart (of course!) takes a small fee for letting you use the machine; I seem to remember it was a couple of bucks on a $200 cash in last time I did it.