>>Give it a little while and we can stuff it with vacuum in spun carbon vessels. How much of a while? This is nowhere near being a reality. Helium is expensive

>>Give it a little while and we can stuff it with vacuum in spun carbon vessels. How much of a while? This is nowhere near being a reality. Helium is expensive and getting more and more scarce. Airliners are pretty safe. Safer even than walking, when measured by passenger miles. I'm sure therr is a market for airships (similar to train travel), but I don't see how it would be arguably better than fossil-driven air screws.