from my experience in chicagoland, the presence of sidewalks seems most closely correlated with lot size.
normal middle class suburban areas in chicago almost always have fairly complete street infrastructure: sidewalks on both sides, curbs, sewers, streetlights, etc.
but when you get into the larger lot "country" subdivisions, they tend to eschew sidewalks, curbs, sewers, and streetlights, i guess so that they can pretend that they're living out in the country or something.
i imagine this general correlation exists for most eastern cities (large lot "country" burbs aren't nearly as much a of thing out west), though chicagoland might have a higher than average percentage of its suburbia fully side-walked.
these two examples are less than a half mile from each other, and built in the same general era:
normal middle class surburbia:
https://www.google.com/maps/@42.1920...7i16384!8i8192
large lot "country" suburbia:
https://www.google.com/maps/@42.1932...7i13312!8i6656
i have no numbers to back this up, but it seems like there's less large lot "country" suburbia being built today compared to 60s/70s/80s.