Years ago when I was in San Francisco I picked up a paper Muni map and rubber stamped in a white space on the back was Compliments of Mayor Moscone’s office. I thought, “He’s been mayor for years. How much would it cost to simply print his name instead of stamping it?”
Three days later her was shot dead along with Harvey Milk. 
Britain is still using the occasional post box with “VR” on it.
If it ain’t broke, don’t replace it.
ETA: Yesterday, I bought a package of stamps with Charlie on them. Rather sombre - his face is in shades of grey, with a dark grey background.
Badges and stuff will gradually get turned over as new stock is ordered. In most cases the old stuff wont be binned just for being out of date (last time we couldn’t afford to, anyway).
What in the U. S. has to be replaced when a new president takes office, other than stuff like stationery? Our police and military don’t have anything equivalent to the royal cyphers, AFAIK.
Well, a lot of government offices will have a portrait of the current president hanging in a prominent place. I’m not sure how much they spend on the print. The frames are usually pretty spartan.
Not a new president, but when a state has a new governor, they change the Welcome to [State Name] signs to include the new governor’s name. Typically, though, they just cover the old name with the new one, rather than replacing the whole sign.
They don’t replace them in the UK either. They use up existing stocks, and only when new stocks have to be manufactured anyway do they roll out the new cypher.
Yes, the articles note that.
It’s not a very good cipher–trivially easy to decrypt.
Every military headquarters from at least battalion level and up has a picture of the chain of command to include the president. Used to be they would send out tons of official glossy photos. Now they probably print them locally.
That’s why they spell it with a “y.”
Royal Canadian Mint unveils new coins with His Maj on them.
Do you (or does anyone) know why on earth this has taken so long?
I know it’s crass to anticipate a death, but surely a monarch in her mid-90s would prompt someone to at least consider plans for a change in coinage, such as maybe having a portrait queued up and the dies in production. Even if they hadn’t, why would it take over a year? They have to do new ones every calendar year, anyway. I know in the UK they changed the backs, too, but I don’t think we’re going anything quite so radical, are we?
I’ll believe he’s king when I see a penny with his face on it wind up mixed in with the American pennies in the change in my register at work.
Ummm … Canada hasn’t minted pennies in at least ten years, give or take.
All the more proof that this fellow is some sort of Stuart pretender, or, even worse, a Catholic. 
Dimes with his face on it mixed into my change bin, then.
The article said the were released Tuesday on his 75th birthday, but several commemorative coins have already been released.
I wonder if this will be such a short run that the mintage won’t be very high, so that with “first year” demand that they will become desirable. They can probably crank out lots of coins yet this year, so I doubt they’ll be all that rare. It might be fun to try to find them is circulation though.
My understanding is that the monarch personally approves the effigy for the coins, so even if the mint was making some plans, nothing could happen until the King approved it. Charles has likely been busy this year, what with the funeral, the coronation, the presentation in Scotland, and so on. New coins might have been low on his list.
Only after he approved it would it be possible to make new dies.
Coins are not banknotes. They last for many years, and SFAIK they don’t have to do new issues of every coin every year. There’s no mad rush about updating the monarch’s image; why would there be?
But they do issue coins every year. Usually the date is all that changes. 2023 is unusual in that there HAVEN’T been any coins issued. It’s not like we’re going to run out; it’s not a(n inter)national emergency. It’s just that it seems odd that it would take so long.