Hi Danny, one thing I sort of worry about with stuff like that is getting the whole screen sort of locked up with assistive or predictive things that you can no longer just freely place points anywhere you want, although it's more of a worry for freeform curve drawing than line and arc drawing.
But still what you show there seems to be cycling through quite a few different possibilities flashing on screen and that can bring a certain kind of learning curve needed to figure out how to control it... I can certainly see how it can be useful but there can be a fair amount of complexity that goes along with it too.
- Michael
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