Let's not pretend that there is any equivaence in the level of support we've provided. Among other things, I cited multiple examples of cured meats that do not involve the use of nitrites or nitrates. You simply ignored them, even when directly asked about them multiple times. As I said, that's a very good indication of the problems with your claim.
No. Chilling the meat allows for plenty of time in the smoker already and the meat is already cooked, so there's nothing I'd be trying to accomplish with cold smoking at that point.
I've SVed whole packers...both for pastrami and just for BBQ...ranging from 12 to 18 lbs. The interior of the meat reaches the target temperature within a couple of hours, even for the larger packers, and since your total cook time is anywhere from 36-72 hours any variability in reaching target temp internally can be safely ignored.
Yes, that's right...cooks as long as 72 hours. Another advantage of SV is that with the ability to cook for extremely long times without danger of drying/overcooking the meat you can cook a brisket to a medium-rare doneness (~132°F-135°F or so) and have it turn out fork-tender. One of the favorite uses of this principle is to cook a chuck roast for 24 hours at something like 132°F, with the result being surprisingly similar to prime rib. That's something you can't achieve with any other cooking method.