Hyperloop doesn't work, there's nothing demonstrable coming out of any of the prototypes, and the trade-offs of maintaining the semi-vacuum over great distances

Hyperloop doesn't work, there's nothing demonstrable coming out of any of the prototypes, and the trade-offs of maintaining the semi-vacuum over great distances isn't worth the cost vs an open air train track. It's pure fantasy at this stage. The main reasons people choose airplanes over trains is: A) Cost B) Time Journeys like london->edinburgh are already equivalent to flying times in real world conditions: https://www.youtube.com/watch?v=v6MGpvuCKD8 https://www.youtube.com/watch?v=v6MGpvuCKD8 So why don't people take the train for these distances? Cost. The easy solution is to tax flights and use the taxes to offset railway prices. The existing rail networks are there today and deploying 400kmph trains is possible using existing, safe technology. This would mean paris->berlin in 2.5 hours which solves the time problem for even larger distances