NYC already have a functional mass transit system. Why does any transport discussion on HN become train focus? Why it's so hard to understand there still is the need for other modes of transportation. At the very least, tourists want to view the city from above, or those who wants a quick hop from JFK to Manhattan. This is not a replacement for mass transportation.
At least try to show curiosity about what they want to solve.
At least try to show curiosity about what they want to solve.