Ditto everything you said, YB. I have been using a VB from my first days as a hanger, as part of my SS. I have also routinely used it in my PeaPod at temps between 10 and low 30s.
The only thing is, I have not personally had any problems so far using the VB/SB even at the warmer temps, hanging below me in a hammock environment. Though I do see the risk, and some people will have those problems. And I might in the PeaPod if I tried to use a VB much above the low 30s. But so far for me, as long as I don't allow myself to overheat and adjust on top as needed, there is no significant moisture in my hammock, quilt or even on top of the SB itself. There are often a few small drops on the SB. However, a recent SS user ( was that Hugger?) was having moisture problems that never did get resolved. So I guess folks vary.
In fact, even in the high 40s to low 50s, the only trouble I ever had with condensation was the one time I used my SS without the SB. The next morning the foot of my OCF pad was quite wet. That was, of course, because the SS UC is also a VB, thus I had insulation between that VB and myself. And that insulation got wet, and the foot of my bag did also a bit. But I was warm anyway.
Oddly, there have been times at even warmer temps when I have been able to use only the UC without a pad or SB, and have not gotten any condensation. But I suspect if it had been a few degrees cooler, I would have been wet.
For I consider that the sufferings of this present time are not worthy to be compared with the glory that is to be revealed to us....that the creation itself also will be set free from its slavery to corruption into the freedom of the glory of the children of God. For we know that the whole creation groans and suffers the pains of childbirth together until now.