I was watching the Pirates of the Caribbean movies last night, and noticed this:

Very early on in "At World's End", when people are about to be hung including a young boy, we see that the boy has braces.

Modern tooth braces were invented in 1819, and the movie is set in the early to mid 1700's.

Like along the lines of emo, goth, etc. but like people who live as though they're living in a different decade. Like for example if the subculture were based around the 80s, they would listen to 80s music (probably not exclusively, but in general it's their "go to" style), go to 80s style dances with that kind of music, decorate their living spaces with decor from that time period, play with toys/games from that period, etc. Those members of the subcultures who are musicians would make new music along that style, as if that were still the "in sound". Possibly it would even go as far as, if women (or men) in that subculture keep diaries, they would date the entries with a date in that time period. Effectively spending all the free time they have in a bubble where that time is still current.

Are there subcultures like this?

Just watching an episode of Shogun on FX which is set in 17th century feudal Japan. A character used the phrase to "make a scene", which did not come into use until the 19th century. Anybody else notice language anachronisms?

So, my apologies if this isn't appropriate content here - this is my first time here...

Having said that, I was just watching National Lampoon's "Vacation", and yeah, during a scene where Chevy Chase get's into an accident while driving the Family Truckster (the dessert crash scene), and an airbag goes off...

What's that all about? Airbags weren't required in cars until 1998 (https://www.history.com/this-day-in-history/federal-legislation-makes-airbags-mandatory#:~:text=September%2001-,Federal%20legislation%20makes%20airbags%20mandatory,sides%20of%20the%20front%20seat.

Here’s an article that I wrote on anachronisms. Do give it a read :-)

stratagear.com/fusion/original-ideas/2019/07/out-of-place/