It's really puzzling (but extremely welcome) that Blender continues to be such an open source success story. Seems rare for such complex pieces of software in a niche space to get that level of development. I wonder what the secret is.
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That said, Adobe has been doing pretty much the same thing in all their spaces, and it hasn't spurred open-source competition in the same way (though plenty of proprietary competitors have been boosted by it)