Sartre said " it's not what we could do , it's what we can do today". The corollary to this is 'It's not what we knew but what we know today'
It really isn't a measure of how far we've come, knowing a group of arcane facts. This is such a regional activity in which we can go back to the days of holubars, kelty, gerry cunningham, norman clyde, or that first sierra ultralighter, some guy named muir, james d. savage, a couple of handfuls of first nation peoples. Rewind history along the way and very little has actually changed, only materials and technology, much for the better. Resourceful ultralighters have always been here.
This stoopid profanity blocker wouldn't let me print Kelty's first either.