It will also be effected by how many dependencies var's the original scene is drawing on too. If you delete them, but the scene has them listed then you will get error messages that they are missing. You can use this plugin to view what is being used in the scene.
DependencyViewer is a script for finding all dependencies in the scene, and their sub dependencies. And downloading dependencies from selected scene, or from meta.json file in package. You can scan current scene or select VAM preset .vap ...
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You can have more than one Vam install folder. I keep 2 main ones. One has everything i've downloaded so far in the addon packages folder for playing around and viewing other peoples scenes, the other just has the things I need for making and testing scenes and creating my own morphs, looks and clothing. The slimmed down version loads way faster.