The only problem with this idea is plugin hybrids should have been an important step. Why haven’t we already phased out pure gasoline vehicles for hybrid and plugin hybrid? We could have and should have done this when pure EVs were not yet practical.
But that time has passed. EVs are or could be practical for most uses, with current technology. Manufacturers don’t get to just build overpriced luxury vehicles and say “see, no one wants them: let’s go back to gasoline”. Not enough cheap EVs? We could if manufacturers would scale up, or if we allowed imports from China. Not enough charging stations? That’s just time and investment, and was rapidly changing at least up to Tesla’s layoffs. You don’t get to delay the build out and say “see, there’s not enough chargers”. Not enough raw materials? Huge discoveries in the last couple of years, and recycling ready to scale up as soon as enough vehicles are there. Not enough power in the grid? They only respond to steady growth in demand, and need that growth maintained over years. I suppose plug-in hybrid is better than gasoline but we’re really at the stage where EV technology is practical for most and the biggest impediment is just doing it