There were discussions recently about the feasability of changing Blender’s coordinate systems. The answer was that it was highly unlikely to happen because there was no single place where it was defined -instead, it was assumed throughout the code that Z was up, in probably tens of thousands of lines… and the work to regularize that would be gargantuan with no clear benefit -since exporters and importers are supposed to handle these transformations anyway.
There were discussions recently about the feasability of changing Blender’s coordinate systems. The answer was that it was highly unlikely to happen because there was no single place where it was defined -instead, it was assumed throughout the code that Z was up, in probably tens of thousands of lines… and the work to regularize that would be gargantuan with no clear benefit -since exporters and importers are supposed to handle these transformations anyway.