Just want to point out this from the bugs-fixed-list of the new release:
You can now use a Layout viewport properly even if it references a Sketchup scene that does not have camera position saved to the scene. Setting scale, ortho, standard views, it all works.
THIS IS HUGE, and means you can update your viewports without the “oops - model shifted sideways” issue.
It also means you can properly use 1 scene as basis of multiple different viewports, say a plan view and a perspective view of the same plan.
All scene updates carry over except the camera position that you turned off.
You can safely save your sketchup scene with the changes you made without worrying that maybe you changed the viewing position as well, as long as you have those scenes set to not save camera.
It means you can regard your, say, 1-floor scene as a work_and_model-scene, and not just a presentation scene.
Thank you Sketchup !