@mhoye and the social struggles they have. Is it time pressure? Money? Disconnect from management? Appreciation? Disconnect from the purpose of the software?
I'd probably also take a lecture to talk about quantifiable effects of lack of gender equality, and diversity (if you can find an expert at a different faculty, invite them?).
Talk about how FOSS projects survive differently than companies. Talk them through a contribution to someone else's (or another team's) codebase in both cases.
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@mhoye I just realized that "first semester" means that students still think they'll be developing the next big AAAA game alone; you might want to very brutally clean up that misconception.