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Description of problem: Incorporate the feature of GNOME Multiwriter that supports writing an ISO to multiple sticks simultaneously. https://blogs.gnome.org/hughsie/2015/01/02/introducing-gnome-multiwriter/ I haven't asked, but I'd think the Fedora ambassadors would appreciate being able to produce multiple USB sticks simultaneously at events. Although of course they could just use GNOME Multiwriter for this use case.
At this moment, I don't think this is a necessary feature. Being able to write to multiple drives simultaneously is the domain of the Multiwriter while FMW is aimed especially at new users who generally don't need that. Of course if there's enough demand, I'll look into this. (Whoever is interested in this, please leave a comment/mail or at least cc yourself)