Yes. I think in Unity's case this is a consequence of their 3D and 2D originally (or maybe still?) being the same thing, so they preserved the X and Y axis betw

Yes. I think in Unity's case this is a consequence of their 3D and 2D originally (or maybe still?) being the same thing, so they preserved the X and Y axis between them. 2D coordinate systems almost always have top left as (0,0).