Public transit is not "100 years back". London, uk is not exactly backwards looking in that sense, and the vast majority of people use trains/metto to go to work.

I walk 10k steps a day on a normal day, only drive when necessary to go out of my normal routes. This has an added benefit of keeping me, an aging programmer, in shape (as well as other relevant activities).

Nothing dramatic about it at all.

Most people in societies built car-first/only (USA) truly rely on their cars. The situation is not the same in big parts of Europe and Asia. We can go 100 years forward and fund public infrastructure which is better for the environment, more safe and gives a much higher socio-economic value (except for the highway lobby).

> but most people truly rely on their cars, otherwise they would lose hours everyday...

They lose hours, lives, and a boatload of money every day in the current state. Removing the reliance on cars will improve those things.

It is healthy to walk. You should be walking probably an hour a day at least if we are being honest. You are made to hunt and forage all day, not sit down. Use it or lose it.