XpressWest is still unfunded, and not having a whole lot of luck securing funding. To-date, they've only managed to partner with a Chinese consortium to begin tackling the regulatory approvals. This one is still far, far away from graduating out of vaporware into something real. Despite all the promise that makes it seem like a no-brainer, such as contiguous connection to California HSR and co-usage by multiple potential Amtrak routes.
Nevada's still got a long, long way to go at wrapping brain around transit. The various incarnations of this project shouldn't have had to languish for 20 years, but there's just not a very organized public-private relationship at work here compared to elsewhere. I'd be mildly surprised if this latest plan makes any more progress than all the vaporware that came before it.
Texas Central had a lot of momentum going for it in the early going, and the promise of robust private funding getting it done relatively drama-free. Now that the corridor has actually been chosen, however, it's starting to get eaten alive by eminent domain fights. A known Achilles heel of HSR projects attempting to cleanroom ROW's. Texas, unfortunately, has pretty strong land ownership protections which are going to make fighting these disputes very time-consuming for Texas Central.
It's more than vaporware, but it's way way premature to be calling this a done deal. They've got a long slog ahead of them.
Brightline/All Aboard Florida...yes, that one's the real deal. They've already placed their rolling stock order: Siemens Charger locomotives just like Amtrak, and Siemens single-level coaches which they hope to later bid as a proven product for Amtrak's humongous Amfleet replacement order. It helps a lot that the project is being funded by the hedge fund that owns the freight railroad it runs on, and that the corridor pretty neatly matches up with that railroad's mainline...eliminating need for negotiations with other parties. That's allowed them to make a lot more progress a lot faster within-cost through vertical integration.
It'll be a fascinating case to watch in action. All Aboard Florida isn't true HSR, but rather mid-speed 'fast diesel' at 110 MPH on an upgraded existing corridor. Something you only see today on parts of the NY Empire Corridor and a small segment of Chicago Hub through Illinois and Indiana. That sort of emerging standard is where a lot of potential HSR corridors in the country need to pass through. Especially the ones that don't have the luxury of a singular linear network like the NEC or CAHSR to glom off of. Chicago Hub, for instance, gets its biggest bang-for-buck getting all of its radiating lines up to 110 MPH before it even attempts its first electrification to, say, Chicago-St. Louis. It's no single corridor; to prime it for an HSR future requires cranking up a whole spider map's worth of existing corridor routes to peak efficiency on their existing infrastructure first. Simply because that's the only way to prime the ridership pump. If AAF can find new efficiencies for quickly deploying that kind of route performance and getting private investors and private RR's involved, there are many places--none moreso than Chicago Hub, but also a lot of places in the South--where that same scalability can be applied.
Very exciting project as a potential icebreaker for getting similar mid-speed/emerging corridors to graduate from endless studies to greenlit builds. Well-executed, it'll take a lot of the fear and anxiety out of pursuit of similar builds elsewhere.