I consider APIs that use degrees essentially broken. (And similarly, APIs that express ratios as numbers in [0, 100].) But you have to consider that a lot of g

I consider APIs that use degrees essentially broken. (And similarly, APIs that express ratios as numbers in [0, 100].) But you have to consider that a lot of game engines and related tools are intended for an audience without a strong programming background. You wouldn’t expect a 3D modeling tool to display radians. And if the UI shows degrees, the file format would better use degrees as well to avoid rounding errors. And then maybe you want the scripting layer to use the same values that the UI does. And so on.