>3 phase is a huge deal, especially for commercial fleets.

Commercial fleets in the US will use 3 phase for DC. For commercial installations, this is a non-issue [0]. It's more efficient to use DC charging at scale than reside on the vehicle's onboard rectifier.

>I think north america is going to regret not having 1st class support for 3 phase charging baked into all electrified vehicles in the long term.

It's already here... Where are you getting your information?

[0] https://www.eaton.com/content/dam/eaton/products/emobility/e...