What's the record?
"Hyperloop also boasted about its latest speed record, which stands at 387kmph"
What's that a record for? A steam train has recorded over 200km/h, bullet trains over 600Km/h, cars (well, a car) is now supersonic and planes are faster still.
Is this simply a maximum speed recorded for a particular Hyperloop test vehicle?
A bit like giving a fastest speed record to a red Fiat Panda with four occupants and a dog whilst driven through Dartford Tunnel in the rush hour with a small flag flying from the rear window ...