Conversation so far:
What was Anton Webern's performance style?
Anton Webern insisted on lyricism, nuance, rubato, sensitivity, and both emotional and intellectual understanding in performance of music.
What happened in 1966 involving Anton Webern?
Günter Wand's 1966 recording of the Cantata No. 1 (1938–40), Op. 29, with the Symphonieorchester des Bayerischen Rundfunks et al., may likewise be contrasted with both of Boulez's renditions.

Question: Was he a composer and a conductor?
Self-contained rewrite: Was Anton Webern a composer and a conductor?