For what it's worth, this is lifted from the Yankees 2018 season ticket pitch:
2018: Please note that the protective netting is presently located behind home plate, extending between the inside of the Yankees' dugout and the inside of the visitors' dugout. The Yankees are seriously exploring extending the netting prior to the 2018 season to the outside of the Yankees' dugout and the outside of the visitors' dugout, with the height of the netting being reduced as it approaches the dugouts. However, the Yankees are continuing to consult with the architectural firm that designed Yankee Stadium and the netting manufacturer and engineering firms so as to determine the exact height of the netting, the length of the prospective extension of the netting and the manner in which it would be secured to the Stadium.
It seems to suggest that the nets aren't likely to go beyond the dugouts, which would be a great thing for people in 11-14 & 108-11 and 26-29 & 129-131