[trevortheblack]

Yes to both.

There was a time when Unity had momentum because it was free* and the documentation was (comparatively) better than Unreal for the average user.

The learning curve for unity is arguably better for 3D and inarguably better for 2D than Unreal.

*The seat cost for unity has been low (albeit changing over time), but you could release and ship a video game without paying for anything