"Of course you couldnt fathom that anyone who's cycled as transportation before would ever go back to driving. "

Hmmm... there's a series of self-righteous assumptions you're making. Cycle commuting an extreme activity, I can't understand car use after riding a bike, whatever. I might even admit to making the same sort of assumptions now and again, so I'm not too testy about it.

Of course I can fathom someone going back to a car. I even use mine now and again. But cycle commuting has nothing "extreme" about it, sorry. Unless you factor in it's often extremely convienent. More so than a car, in certain situations. No one here has claimed it's perfect.