Thanks!
In our use case, our customers can build their own “apps” based on Aurelia and install them into our platform (also based on Aurelia). We then guarantee that they can use a set of custom elements build by us, e.g. <sci-list-view>, <sci-grid>, etc. We have a lot of these <sci-*> custom elements build with Aurelia, but we don’t want to load these just before they are actually required by some component in one of our customer’s apps - otherwise we would have a very slow startup of the entire platform.
This is our use-case for lazy-loading custom elements 
Hope it makes sense.