The curve variations were used during development of the GeometrySet changes. The lights and point instancer coverage would have helped uncover bugs earlier. Bugs that eventually had to be fixed in 4.1. Better late than never. The one downside is that the light tests is actually a round-trip test, which is normally fine to do, except it technically does an export during the import test. Pull Request: https://projects.blender.org/blender/blender/pulls/119858