This is very true, I think one company spent like 8 years figuring out how to actually design an actually useful, actually reliable train tunnel sized vacuum seal, and then basically disappeared after...
...well its really expensive to just make one. And it would take even more money to be able to ramp up production facilities to be able to make the many needed for a theoretical system of them. And it would take forever to build them, in terms of 'oh no our loans are due and our investors are angry'.
This is very true, I think one company spent like 8 years figuring out how to actually design an actually useful, actually reliable train tunnel sized vacuum seal, and then basically disappeared after...
...well its really expensive to just make one. And it would take even more money to be able to ramp up production facilities to be able to make the many needed for a theoretical system of them. And it would take forever to build them, in terms of 'oh no our loans are due and our investors are angry'.