Could be I suppose, but what about others? I guess the problem I see is that any given webapp might need to download & store several gigabytes. If the models w

Could be I suppose, but what about others? I guess the problem I see is that any given webapp might need to download & store several gigabytes. If the models were built into the browser, the browser would need to download & store the model data, but that can at least be a lot more efficient than websites doubling up on download & storage of models.