IIRC, they did deploy that battery swap thing to some charger locations (hearsay, didn't confirm) and charged as much per swap as gassing up an SUV, plus you had to return later to get your battery back. They gave up because nobody wanted to do that.

A bunch of these claims are understandable with the tech and hype available at the time they were said, but there wasn't enough committent to follow-through. Not that it would have helped much.