These two images are typical rural sprawl compared with Central Manhattan, on the exact same scale. Now I'm not an expert on these matters, but something tells me pollution, traffic and logistical problems would be much, much worse is everyone had their own plot of land.
Where's the town in the left side of the picture here?
You can redevelop towns along rail corridors and such, sure. Even getting to the train station here is gonna be a car ride for most people here, and the road network and assorted infrastructure to keep cars going, at which point, why not just take the car?
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A 30 minute e-bike ride before you even get anywhere with the train doesn't really feel like retaining the freedom of movement here in a sense comparable to now.
I mean it's what I'd propose, but then I think if you live out in the boonies somewhere this spread out you kind of have to just eat the fact that you're gonna take a lot longer to get anywhere.