Well. I saw your response to my prior comment about not carrying a tripod.
IMO, ultra wide lenses require a tripod every bit as much as long telephotos do, particularly the SWC. Not for reason of them being slow or working in poor light, or being indoors or out; but because, to me, the tremendous joy of the SWC in photographing anything is to exploit the astonishing detail resolution that the Biogon 38mm lens is capable of, right out to the very edges and corners of the frame. With an ultra wide lens, you're doing the opposite of what you do with a telephoto: you're packing a huge amount of detail down into a very small space by decreasing magnification. (With a telephoto, you're extracting a huge amount of detail from a very small space by increasing magnification.) Camera steadiness is key to obtaining good results in either situations.
Of course, for many types of photography, ultimate resolution is not a player in the "most important factors" game of what makes a photograph sing. For the loose, hip shooting style of some street photography, it's certainly not an issue. But when I carry the SWC, I want to be able to take advantage of its lens.
My tripod folds to 19" x 5", and weighs 4.2 lbs. It fits in my rollaway/carry-on bag. It comes with me. 🙂
G