Unless you're more than 700 years old, you're not older than common usage of singular "they" (which entered common usage in the 14th century). It's honestly not

Unless you're more than 700 years old, you're not older than common usage of singular "they" (which entered common usage in the 14th century). It's honestly not that new of a concept. I'm honestly always a little surprised when this topic comes up with the number of people who find this grammatically jarring. To be fair, I am fairly young, but I do remember learning about singular "they" while I was in primary school in the early 2000s. Is the issue that this isn't taught in US schools, hence all the confusion?