I really like the intuitive way of drawing in Sketchup. Microsoft tries to copy it for their own program, but I haven't ever found something similar for linux. There seems to be no way to do 3d on linux (assumed that I do not want/not have the time to learn blender).
My following thought might be absurd or insane: What if Sketchup would have always been open source? How would we feel in modeling or suggesting new ideas or reporting bugs to be fixed? Graphic cards to be supported and so on...
Currently, Google does not put much resources into developing SU, which forces us to include everything with slow/sluggish plugins (for additional features, plugins are ok, but not for missing basic functions). There are not much progresses for the main application, it is intended that Sketchup is extended by the community.
I'm myself very skeptical about this and don't know if it would be really preferable, but maybe one time, they will clean up there profile (SU is no web app)...