[Gravityloss]

I think that's a sign of advanced technology. If it's silent and comfortable.

I also feel it's like the M&M test for quality and culture of a company or nation.

[ant6n]

The Shanghai airport transrapid is surprisingly loud and rumbly, kind of like a roller coaster with its rubber wheels. Or like the Montreal Metro.

(in Montreal they also believe that heir trains are super smooth and quiet because of the rubber wheels, compared to steel train. I can not explain this belief.)