That whole "common cartridge for rifle and pistol" thing has always escaped me. We mostly use them for different purposes at different distances. If we wanted redundancy we could just carry two of either.
I've not done actual research on this, but I tend to believe that this concept is more of gun writers parroting gun writers, parroting gun writers. Throw in the odd gun shop know-it-all for the sake of validation and voila - we have a foundation of history.
I could go on about this idea all day, but I'll make sure I don't go on too long a tangent here.
Most old-timers I've known, whose lives began in the latter part of the nineteenth century owned ONE GUN, even as we today discuss how ridiculous and impossible that concept is. Among any of them I was related to, none even owned a handgun - a handgun was a wasteful extravagance. Neither has any of those old fellas owned a center-fire other than a shotgun - ONE shotgun. Geographically and economically speaking, this concept might not hold true in everywhere. Here, in the eastern states, especially in "the hills," ranges for deer hunting are close anyway - most of the time. Those olde-timers I knew never saw game like we do today either. Deer-hunting or water-fowl hunting wasn't part of the plan. It was small game; squirrels 'n' rabbits and that was a large percentage of the family protein supply, in addition to small livestock (to include pigs) and birds.
My paternal grandfather probably never shot as many 22s in his entire life as I currently have stashed, and I don't have a large stash by any means, but he never missed a squirrel that I know of either. He had a ratty, non-descript, single-shot bolt-action, of which I could not make out a name or model for wear on the surfaces.
TODAY, I think the "combo-concept" has a lot of merit, especially with "modern" RIMMED PISTOL cartridges, where a carbine can extend the range of a HANDGUN round significantly, but still within a LIMITED range, meaning nothing like that of the 30-06, but certainly more than your snubbie.
COMPATIBILITY and COMMONALITY of components and tooling can be helpful during these periodic droughts, and the small appetite for powder of the smaller case allows me to shoot rifles as well as handguns.
Again, I have no formally accrued data to share, so this is opinion/weak hypothesis, but short of some eastern dandy who had money and time to decide upon and acquire the supposed best gear setup for when he heads west, I think the concept was much less common than we suppose today. Surely it was not overlooked, and doubtless a number of fellas applied the principle, but I don't think it was as common as has been made out in our own time. Just like any history, we tend to observe what the more well-to-do did and the masses remain silent and unaccounted for throughout time.