Scrolled down the page, saw this "Very Easy" 1 minute plane
https://www.foldableflight.com/planes/mystic
Started watching the video not planning on actually making it, saw that it is done with A4 paper and grabbed a random sheet at my desk to follow along. The pocket felt like a nice "a-ha!" moment. As someone who only knew the "naive" way to make paper airplanes from A4 paper, this is the best performing and prettiest paper airplane I've made in my life! It almost feels like it's not real how smoothly it stays straight in the air compared to all my paper airplanes in childhood.
I've been making the original version of this, the Nakamura Lock, since seeing it in a book as a child. I messed with tons of "world record distance" designs as a kid but this design just always came out the most consistent and had great performance. My favorite part is just the simplicity of it.