[majewsky]

Not necessarily. Making a technology of this magnitude "feasible" requires substantial investments on a scale that requires buy-in from politics and the populous.

Just look at how cars got where they are now. If cities had not invested in converting cobbled streets into asphalt streets [1], if nations had not invested in building highway networks, cars would not have been "feasible", as you say.

[1] In hindsight, asphalt may look like the only plausible solution for city streets, but it actually causes a bunch of problems with drainage and microclimate because it completely seals the surface. In cities where traffic relies more heavily on walking, bicycles and trams, you will see more cobbled streets because they work better in these aspects.