It was 20 years ago (maybe more) I heard about a bullet train, or some fast train system which can benefit the community. Votes are in. Yet I have not yet seen

It was 20 years ago (maybe more) I heard about a bullet train, or some fast train system which can benefit the community. Votes are in. Yet I have not yet seen a bullet train. I hate to see another 20-25 years go by and nothing made of it by that time again. I would like to see something finished and not half-completed or half-started and not find out after another 25 years go by. I also wonder if it becomes some near obsolete transportation method by this time. Hopefully it can also support and be future compatible to support future transportation engines of some sort or thought through to allow for such compatible iterations. I'm authentically curious whether it is feasible engineering and infrastructural-wise to have something ready in just a couple of years? Is it possible to have proper planning/design done fast including any bureaucratic politics? Or is this all really an impossible mission? I write this because I once heard it also took years to just extend a simple bus stop route.