Technical, no ... but economics, yes. Here in BC, the utility buys large quantities of transformers, and that affects the price they pay. So standardizing on 600 V secondary service means money. Similarly, the PT/CT and metering equipment are purchased for 600 V service, so BC Hydro will not authorize any new service at 480 V. There are a few sites that I've worked at that have 480 grandfathered in, but those are the rare (and getting rarer) exception.
Tesla, if they want 480 V equipment in Canada, will have to accept that most utilities expect them to provide their own 600/480 transformer and connect it after the billing equipment.