TopBunk and all,
JFK will hang onto a runway alignment as long as it can because to change it, generally LGA and EWR will have to realign also, essentially bringing all three metro airports to a halt for 20-30 minutes. They will keep going on alignment right up to a 10 knot tailwind, or, in the case of the Canarsie approach, until someone misses or says I’m not going to do it.