(I don't necessarily agree with Sator, his taste in tempo is eccentric, but I thought that his analysis of the Siegfried prelude was spot on. You don't hear the trombones in the other recordings.
A little while ago you were perplexes why someone's favorite part in Gotterdammerung was Waltraute's Narration. Ludwig is pretty boring on the Solti. The 1951 Knappertsbusch and Bayreuth Barenboim is much more interesting in that regard (W. Meier is Waltraute in the latter).