DL switched from a reliable 764 to an A339 (A300-900neo) at the beginning of the month and Tuesday's DL262 JFK-CDG, the incoming for yesterdays DL263, took a mechanical and was subbed by an A333 along with a scheduled 2 hour delay which turned out to be 2.5+ hours. DL263 was rescheduled with a 2 hour delay at CDG and did make it of the gate 11 minutes late and landed a few minutes early.

The 300-900neo appears to have lots of reliability issues and the J seating on the 764 resolves many of the seatig gripes.

It still dumped us into rush hour traffic getting away from JFK.

You'll probably still have to re-clear security at CDG which can be a miserable experience.