The MTA actually went from using a lot of hybrid buses to fully diesel at one point[0], and now they're slow rolling out fully electric by...2040[1]. Just far out enough they can do basically nothing over the next couple years, and still claim they're on track.

[0]https://nypost.com/2013/06/30/mta-hasnt-purchased-a-hybrid-b...

[1]https://www.timeout.com/newyork/news/200-electric-buses-are-...