One of the many ways I've leveraged SB over the years is using it to transport browser sessions (almost always a subset of windows and their tabs) from one computer to another. I move between about a half-dozen different computers on a regular basis. For any number of reasons, I often start some piece of work on one of the computers, but then need to continue on a different one. Being able to transport those browser windows and their tabs has been a life saver for me!
I am almost certainly an edge case in the number of browser windows that I keep open, across lots of virtual desktops (e.g., Spaces in macOS)). I find that this helps me organize activity by "project", and allows me to either focus on a particular one, or switch back and forth between them easily, and very regularly those "projects" have to move from one computer to another.
These portable sessions hinge on the ability to copy/paste plain (or formatted) chunks out of and into SB. I've always just assumed that this was a common SB usage. From the almost complete lack of discussion of this in the group, I'm realizing now that perhaps it's just me. :-)
Btw, this session transport has usually necessarily happened via email. Oh my goodness, how I excited I was to see "cloud storage" mentioned in the v4 annoucement!! :-)
Thanks!