I live in a small city built out a couple decades ago

It’s probably a fair point to mention that smaller cities and towns have wildly different parking needs than NYC, where the majority of residents don’t own a car. The existence of parking minimums in a place like New York is just bonkers. (Thanks, Robert Moses!)

I still expect plenty of parking to be built after any city repeals parking minimums, it just isn’t an excessive amount, and the city and developers soon start arriving at a natural equilibrium (compared to an inflated floor) of what is actually required, depending on what kind of business or residence it is, where it is located, etc.

The big factor about parking is how much it adds to housing costs. The Government Accountability Office did a report in 2018 that estimated that parking requirements added $50,000.00 to every housing unit sold. Obviously, some parking will probably be needed, but just reducing the amount has the effect of an immediate per-unit cost reduction for a given multi-family project. https://www.gao.gov/assets/gao-18-637.pdf

Return on investment is still heavily in favor of solar or wind generation with battery or hydro storage for low generation periods.

Pretty sick and tired of so-called clean aviation fuel efforts. Just build the damn high-speed rail already, knock out most of the domestic air travel, and limit flights to trips that couldn’t be done by train. That requires zero new tech and would make WAY more of an impact on greenhouse gas emissions than hydrogen jets ever could.