Well, I predicted Wikipedia in the early '90s. How could I not have predicted this: Banks are rationing coins. Why? The US Mint cut back production of coins so it could distance its staff to reduce their chances of infection. Reasonable enough. However, something else happened during the lockdowns: People stopped going shopping as much. Bank lobbies were closed much or most of the time. And when people don't hit the stores as often, they have fewer chances to cash in their piles of pocket change via CoinStar and other similar machines. At our usual grocery store, the coin machine was moved out to make room for a new curbside pickup system. Curbside pickup reduced the number of people entering the store, and thus traffic past the coin machine. In truth, I don't even know if it's still there.
So the pennies are piling up. Even I have more of them than I generally do. Last fall I noticed that I was getting a lot of old-ish pennies in change, and wrote up my theory that older people are dying, and their kids are cashing in the penny jars in the kitchen cabinets, nightstands, or other nooks and crannies. I was getting several a day for awhile. After the first of the year they became a lot less common. I still don't know why. I now maybe get three a week. Maybe two. Some are old while still looking very recent: last week I got a 1992-D with about 90% of its mint luster. Not bad for a penny that's old enough to vote.
My guess: Not only are the penny jars still out there, the old ones are filling up even faster and new ones have been started. Once we're shut of the lockdowns, a yuge pile of pennies (and other coins) will surge into the bank lobbies and coin machines, and I will once again see 40-year-old mint luster when I pop for a coffee at McDonald's.