Grasshopper is visual scripting. So you can automate things in CAD without the need to write code. What you do with that is up to you. If you need to do repetitive drawing then it might by worth it. However creating parametric models in GH is a much slower workflow and of course it has a steep learning curve to master. It really depends on the actual usecase if it’s worth. In any case I believe it’s fun to do. Be aware that the term “parametric design”, which Grasshopper is usually referring to, is not a solution to make Rhino a parametric modeller.
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