@inaforest
This comes off as a bit of a weird deflection considering the original post was specifically about cities, nevertheless if we must ...
If you're talking about truely rural areas (farmhouses, cabin in the woods) then public transit has never and likely can never be applicable. If you mean rural towns, yes many used to have access by rail and can again. The only reason they don't is because of the false narrative that passenger trains (and public transit in general) must break even or make a profit as opposed to being run at a loss as a public service.
As for suburbs, yes but with the caveat that transit oriented suburbs (both legacy trolly suburbs and modern transit oriented suburbs) were / are designed quite differently from car dependent suburbs. Retrofitting existing car suburbs is actually a pretty big lift. Modern car dependent exurbs, OTOH, are likely a complete impossibility for service by transit. Their existence is wholly predicated and dependent on the use of personal private vehicles.