>It has gotten twice as cheap (if you look at average ticket prices adjusted to inflation) from 70 to now.
Which is consistent with the gp's point that progress has slowed down.
It had gotten 100 to 1000 times cheaper, faster, more efficient to e.g. travel intercontinentally between the 1900 to 1970 that it has between 1970 to now.
Which is consistent with the gp's point that progress has slowed down.
It had gotten 100 to 1000 times cheaper, faster, more efficient to e.g. travel intercontinentally between the 1900 to 1970 that it has between 1970 to now.