Already started, and in some places a norm for several years. POV and LE transport is a specific instruction point in several curriculums. There can be some teeth grinding from EMS concerned about turf, regulatory worries over "unlicensed ambulances", hand wringing from in-hospital providers and medical directors who just don't understand, and LE admins worried about "liability." It's an easier sell where there are limited resources.
When you have plenty of resources, it doesn't take long to out-bleed the response time or outrun them in numbers. Outside of metros, EMS tends to be dominated by dispersed 1- and 2- bus BLS services, often volunteers, and in a perpetual state of struggle. In most traumas, they aren't providing any services that can't be provided in any other vehicle on the run. That's feels harsh to some, but it's reality.