I would be surprised if the French TGV can go into tunnels at those speeds, or maintain them safely 24-7. Also, the 100 years figure is one I completely made up based on what I’ve seen from conventional trains, I have no idea how long maglev track actually lasts.
Also, the scmaglev is advertised to be able to hold up to 728 people in the 12 car configuration, and can probably reach high frequencies similar to the rest of the shincansen system.
Speed matters for people to actually want to use trains, and maglevs are supposed to be both much faster and even more comfortable than conventional rail. They are a proven technology by this point.
Yes, it’s not cheap, but it has the ability to significantly improve rail service in the northeast, and as the richest country in the world surely we should be able to afford that.
The other argument I’ve seen is that we have to go through all of the trouble and lawsuits around obtaining a new right of way anyways, even for normal high speed rail, so we may as well put the best technology available there.
I agree that it’s a political problem, but I think that a modernized rail system would be well-used if it were available.
I would be shocked if they actually start building the northeast maglev. Happy, but shocked.