Earlier quoted context omitted.
That is a take that I do not understand. How is not allowing closed source plug-ins in Blender defending anyone? It simply means a percentage of those developers who would have been happy to create third party tools simply now don't. See for example the thriving plug-in ecosystem SketchUp has. A third party should be able to create plug-ins without risking their IP - closed source, and any license they like. This mod…
I think it's fine for people to have varying philosophical takes on what should be the normative goals of open source software licenses. Obviously the FSF takes a rather maximalist stance. I personally find this aggressive goal and some of the personalities behind it to not match my vibe. And the reality is that more permissive licenses like MIT are becoming more and more popular. What I've seen some Blender plugins…
If the IPC is here only for the sake of circumventing the GPL (e.g. there aren't any meaningful use of the "GPL plug-in" part through this IPC channel outside of communication with the non-GPL program), it's totally not. What are such plug-ins ?