That assumes the train is traveling at its maximum speed for the entire duration of the trip-- which is almost never the case, even in China. For a route that long with many many stops large portions running over rough terrain necessitating curves and grade changes the actual average speed along the route would certainly mean the average speed of the route would be much slower.

Ultimately, spending a tremendous amount of money embarking on an ultra-high speed rail route between the coasts-- which would certainly be one of the most ambitious infrastructure projects in human history-- would be a waste of time and money compared to almost any other rail project. All that money would be much better spent on high speed rail where it actually makes sense, and on conventional rail connecting every city in the US.

NY to LA will never be 14 hours with current or near future technology. Its 50 hours from Chicago to LA with the slow trains and while high speed rail is a significant improvement its not crazy enough to get speed increases like that.

The great news is that infrastructure to make cities more walkable and bikeable is actually really cheap. Like, compared to car infrastructure that can move a similar amount of people it’s nothing. It’s mostly an issue of political will to actually build the stuff.

It feels a lot more snappy, clean, and modern. I think most of that is because it hasn’t accumulated a lot of the bloat and feature creep that Reddit has over the years. The biggest downside, though, is that the community is much smaller and there isn’t a lot of the niche content that Reddit is so good for.