55mpg is nothing. I get 100+ mpg equivalent on my massive F-150 lightning and if you include cost in the comparison it’s probably a couple of multipliers more than that.

And that's just operating cost. PHEVs have a higher maintenance cost and worse reliability than pure EVs, typically. Certainly higher complexity and more parts.

On top of that, my Lightning was less expensive than the gas equivalent. I've been winning since day one. If I had to sell it today (that would make me so sad), the depreciation would be the lowest of any car I've ever owned.