I like that rifle a lot. Very much in line with what I've been seen carrying most of my life, albeit contemporary examples.
It seems plausible to me that the fancy guns would've received less usage and better care, thereby having a better chance at surviving. When I was a kid back in the 60's, there were an awful lot of old guns around that had been pieced together from older guns. That's generally the way most things went "out in country." Plain guns like this one, po boys, pea rifles, barn rifles, and the like were about the only muzzleloaders I'd ever seen until somewhere in my early to mid teens. That probably explains the appeal to me.