Conversation so far:
What happened with the Vienna Boys' Choir in early history?
The role of the Wiener Hofmusikkapelle was to provide musical accompaniment for the church mass.
How did the the Wiener Hofmusikkapelle providing musical accompaniment for the church mass turn out?
St. Stephen's Cathedral choir, directed at the time by Georg Reutter II, at the time had no boy choristers of its own.
Did Georg Reutter II ever accomplish getting boy choristers for St. Stephen's Cathedral choir?
Over the centuries, the Wiener Hofmusikkapelle has worked with many composers, including Heinrich Isaac, Hofhaimer, Biber, Fux, Caldara, Gluck, Salieri, Mozart, Franz Schubert and Bruckner.
Did any of the composers stay or stick with the Wiener Hofmusikkapelle?

Question: What else happened in the early history?
Self-contained rewrite: What else happened in the early history of the Vienna Boys' Choir besides everything mentioned previously?