Is that really error-prone for a physics simulation engine? That's pretty common to only refer to data by indices in other places - sure, there are languages th

Is that really error-prone for a physics simulation engine? That's pretty common to only refer to data by indices in other places - sure, there are languages that can deal with it a bit better (e.g. operator overloading, manual memory management and/or value types), but as far as I know this is even often done in Rust, which has the previous properties (it's done to avoid the borrow checker there). Also, Minecraft was famously written famously inefficiently.