Yep, I dropped a bunch of the RS-Lite versions off to fill the supply pipeline again.
I also recently acquired the VL Niagara, and I note the closely spaced rollers. Clearly, this one will also benefit from a YLB to keep the sounds from dropping out.
I don't think these locomotives would need one for the locomotive sound board, they have more pickups there, and sound drops are not really an issue with those.