@keithamus @ryantownsend @developers
I'd go so far as to suggest that being this were otherwise inert content that there is room for this to be built around a new tag name, being if the browser doesn't support <newtagname> or <template src="..."> then nothing happens in either case. This opens some nice doors not to feel like we have to continue to pack <template> with every request imaginable for content and custom element enhancements.