Much like the default users font preferences can now be set per-community (thanks!) I think the prefered license should probably be in that scope. I would like to default my TeX contributions to LPPL rather than CC0, but would like CC0 to continue to be my default additional license for code for most sites.
Top Answer
Jack Douglas
I've moved this on to [to a GitHub issue]( so work can begin, and will update the post here when it is complete.

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