I do my best to stay out of new developments, but now even cities are creating dead ends where there was once a through street for crime control. I don't think planners and developers are considering alternate means of transport.
Locally, you have to go back to the 60's to find housing that was meant to be good, but at a reasonable price. They built these with minimal streets. Parking is centralized. The houses don't have garages. They share a wall, so some roofing, plumbing, and building expense. The lots are tiny, probably condo ownership lots. Some of the land is taken up by tennis courts and a fire station, which Google doesn't depict. I doubt they would do the tennis courts these days.
If you wanted to plan for ebike/bike type neighborhoods, this is a pretty good model. Around here, they don't really have water for growing populations, without imposing drastic curbs. That offends people, apparently. So they have to travel to get water from Lake Powell, or pumping from ag lands 50 miles away, if they buy the land. A former construction guy told me it's around $25k just to pay the impact fees, do soil tests, file plans, permits, etc.
I think people who look at cycling or ebikes as transport are pretty intimidated by what they see in terms of where they would have to ride. It's really clear on this forum. There are an intrepid few who at least accept the risks and challenges. Maybe people love the bikes and gradually accept the risks. But I don't think they will sell ebikes without selling the infrastructure to ride them, except for recreation uses. I'd settle for basic solutions if they were integrated and as effective as the budget allows. People around here are much more educated than they were. I get more five finger waves these days than one finger.
My brother has always rode, commuting outside Boston. Eventually he had mishaps, so he would give up, or be on the sidelines. Now I think he rides on paths, but he had a mishap on a path, just a failure of communication.
I'm not sure some types of rider 'help the cause'. People may look at some cyclists and say it is a little nuts. It should look and feel like it is fun, to some extent. I'm pretty sure I am 'selling' something different from the hard core road cyclists.