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[sam (Sam Saffron)]

@LeoMcA

Or would you see the piece in core being more general, allowing any plugin to override any template, with this specific plugin hooking into that and handling the user preferences side?

Yes this is my preference.

@LeoMcA

How would we decide, in core, which plugin gets the final say on what template gets rendered?

I think that is imagining a problem that will, in practice, never exist