It is scheduled to be done in 2035, which means in practice for projects like this 2040 or 2045, and at $25B meaning $30B+. It will surely be abandoned before t

It is scheduled to be done in 2035, which means in practice for projects like this 2040 or 2045, and at $25B meaning $30B+. It will surely be abandoned before then, and we still won't know. What were these small changes that fixed it? Did they have anything to do with the cost going up by 3x? Anyway, inducing radioactivity is not what would use it up. That just makes it super-expensive to do repairs. It would get used up through neutron bombardment weakening the crystal structure of the metals it is constructed of.