I don't do project timeline estimates any more
It's actually bound to offset very little of my ICE driving, because I bike everywhere local, unless it's raining. I can only think of 2 trips in the past couple of weeks where I would have used the FS. It's far more likely that I'll be driving it because it's so cool to drive. (I feel so dirty.)
Ivan, on the other hand, drives more. So it'll offset more of his ICE use when he has it.