Thanks very much tdracer for the explanation.
Though the actual prospects for any further meaningful action in the Congress during the lame-duck session are quite "iffy" at best, I have to wonder whether some added clarity for the workings of the changed product rule either, is part of the pending House bill or Senate bill or both, or would be added in further amendment in light of the actual Return to Service action from FAA. Or if such further clarity, by legislation, would be a good idea at all?
I'm guessing that it will be a topic taken up by one or more of the "further study" efforts eventually to be mandated by the legislation, or by the ongoing DoT Inspector General work.
(Despite occupying only an SLF/atty place here, I hope I can say that sometimes it's quite surprising how much first-hand knowledge posters - I mean the real aviation pro's - take the time to post on threads.)