That'll sort it itself out over the coming decades; but the other interesting one to me is that a sizeable group (majority?) of people are still saying "two thousand nineteen" instead of "twenty nineteen". I'm pretty sure I stopped using the former shortly after 2009 ended. I wonder if that'll stick for the whole century.

In the other language I speak fluently (Portuguese) there never was an abbreviation, it was always the full "one thousand nine hundred ninety" as opposed to "nineteen ninety". In that case "two thousand" is already an improvement, but for some reason it bothers me in English.

Interesting. I definitely prefer “twenty nineteen”, but can’t swear I would never call it “two thousand nineteen”. It might end up sticking around until 2100.

Ah, spelling, old foe.

What contexts do you generally see it used in, out of curiosity?

I'm assuming it still appears in places besides revivals of "The Music Man"

This is the first thing that comes to mind: https://en.m.wikipedia.org/wiki/.30-06_Springfield

I’ve only ever heard this pronounced thirty aught-six.

and for the sophisticated redneck

https://en.wikipedia.org/wiki/.25-06_Remington

Also double-aught buckshot.