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I think many of the plugins that work with X-Plane 10 will work with X-Plane 11 as Laminar did not really change the SDK that is used to create plugins. You can check here to see what experience people have been having. So far the news is pretty good.
http://forums.x-plane.org/index.php?/forums/topic/109873-x-plane-11-working-plugins/
Mark
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