639-year-long John Cage organ performance has a long-awaited chord change today

You can see the performance at https://www.youtube.com/watch?v=lW3FP_atp1w

The performers enter at about 3:27:00, followed by a short introduction by the conductor in English and German, then the chord change itself. In this particular performance, it takes several performers working simultaneously to make any given change. Today's change required the addition of two new pipes.

I'm struck by the similarities between this performance of ASLAP and some of the work of the Long Now Foundation.