The connection from the BMT Jamaica Line to the BMT Myrtle Avenue Line used by the just east of Myrtle Avenue station was completed rebuilt from the ground up in 2018 (I think).
Additionally, parts of the Babylon Branch that were grade separated in the 1970s/80s are elevated. There are mostly just short sections at stations to make space for parking below, but there's also a long uninterrupted elevated section between Lindenhurst and Copiague.