I was wondering if its possible to let the supports getting generated while twisting the part in every angle so that it would change by moving in a constant view. You could select details like touchpointsize before the click to generate but maybe even while the supports are already shown. Just a live generating of the support structures.
Sure, with a Linux cluster backing it up 
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Or a modern GPU. this is a could be a perfect multithread parallel processing task ideal for a GPU. You don’t need to calculate all the detail, just the main stem.
Actually, you might be onto something here…
This might be a problem well-matched to ray-casting algorithms.
Which is what GPUs excel at.
I don’t see where the cost/benefit is, though for a feature like that.
Creating supports the way they are now is not exactly the biggest obstacle in the process 