The Hyperloop was very successful, it prevented billions of dollars of investment in mass transit, then evaporated before it could reduce the market for cars.
"grisly results". Are you sure? I think the pressure failure of the Titan submarine was closer to "grisly". Transit tube failure scores lower on the pressure failure scale. /jk
I want one to get beer from the fridge to the couch. I could move the fridge next to the couch, but if a pneumatic system is an option, I assume I don't have to explain which would be the better choice by a land slide. Cool beers on the couch, in the garden, in the bath tub, etc. I could fire my wife.
Of course I'm joking, I would never exchange my wife for a pneumatic tube system. I don't have a wife.