> Right now in Paris, when you have a newborn, the only mobility solution is to take an Uber if you need to go somewhere >1km from where you leave. Buses are very slow and crowded, the subway doesn't have elevators for strollers, cars are just inaccessible financially due to the war on surface parking space.

This is simply false. I just mapped it from place des Fêtes to place de la Catalogne and selected only wheelchair-accessible options (note that this trip is _not_ easy to do because it goes from one end of Paris to the other). Driving it's 15 km, 45 minutes, using the ring road; public transportation takes 47 minutes (48, RER B, 59/88). You’ll notice the same pattern for, e.g. Parc Monceau to Place d’Italie, a 9 km trip (30 minute drive at 11:47am on a weekday, 45 minutes on public transportation).

Buses are slow _because of cars_. Fewer cars means faster buses. The subway is inaccessible except for line 14, but RER A and B, all tramways, and of course buses are all accessible. You can also use a baby carrier.