It had more margin and manufacturer squeezed it to keep prices. If you want to see real prices look at cheapest cars. Those are no-margin. And that is why their prices are up.
This is not “an excuse”. I literally was in meetings where these cameras and extra compute were priced out in $pastJob. More cameras means more wires. More power supplies. More compute means higher end MCUs which are already very not cheap when it comes to automotive parts. More power supplies for the higher-end compute. Per-unit licensing costs for vendors’ algos to implement EAB and the like. Etc…