Wow, that's crazy. I'm close to 70 hours, so I guess I'll be finding new stuff for a long time. I haven't even started trying the treasure maps (I've only acquired 3 so far) and that was one of my favorite parts of RDR1.
Edit: I got robbed in Saint Denis the other night. These guys asked me to follow them down an alley and I *knew* it was a trap, but I figured the game would at least let me fight my way out of it, lol. Nope. Hit on the head and lost over $300. Lesson learned.
I went out into the wilderness and sulked around with my bear-skin hat for a quite while because I felt like such an idiot.