Re usable elements and loading

Hey all wondering if anyone knew if there are any drawbacks with having re usable elements that aren’t used.
I am designing an app that works in with another app and was thinking of creating a template with all the re usable elements that match the style of the parent app. This way if I create another app with a different use case I can use the same elements and save a tonne of time.
If there are extra elements I don’t use on this second said app I would like to still keep them there in case of future updates however I would wonder how possibly up to 50 re usable dormant elements would affect page load and general running