Thanks @BenStephenson and @UnknownJ! So far this is testing out well. At first glance it appears that tags and extensions using $() and jQuery() are working without modifications. At first I would think I would have needed to conver those to use window.utag.$ or utag.$ instead of just $ or jQuery, because of the noConflict line -- but maybe some scoping things going on that I do not yet understand.
Worst case I'll just remove the noConflict part and still use this idea to inline the script, for the other benefits you mention.
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