For me it’s time signatures in music. I grew up playing instruments, played in several orchestras, etc. But no matter how many times someone tries to explain time signatures to me, it makes no sense. I don’t understand why people place such importance on it. To me, notes have a pitch and a duration, maybe some dynamics. That’s it. I don’t understand why people try to needlessly complicate it. It doesn’t give you anything.
My wife will hear a song and go “Oh neat, it’s in 5/8.” And I’m like “How tf do you know that, and why does it matter?”
I took piano lessons for many years and I could sight-read sheet music … sorta. As long as the notes were within the staves, I knew exactly what key to play. It was when notes were above and below the staves that I had to stop and count how many little lines were attached to each note to figure it out. Obviously that messed up my rhythm a bit lol.
I’m a programmer and I’ve spent thirty years writing music composition software and I never once even thought about incorporating traditional sheet music representation. It’s just so clunky and poorly designed for the job. And when you start getting into microtones it’s completely hopeless.