So after modding RDR2 for about five months (I first started modding it in early August 2023), it has now come to my attention that modding essentially breaks the game engine's ability to properly spawn in NPCs, wildlife, and even trains, in the way the game was intended. Trains rarely if ever spawn in, and if they do, NPCs will be nearly or completely absent from riding as passengers on the train, and the armed guard will be gone who usually stands at the back end of the caboose (only the engineer will be driving the train, but no one else will be present). NPCs will also essentially never be found riding as passengers in stagecoaches or in the back of wagons or riding shotgun next to the driver (only the driver will spawn in). In general, there will be less NPCs seen standing or sitting at train stops like Emerald Station or Wallace Station, or at various locations throughout the world. Further, wildlife is drastically reduced, with only a few birds and deer and whatnot scattered sparsely throughout the surrounding area, perhaps at about a 20 percent (or less) amount of the densely populated wildlife that is typically found in the vanilla game.
The only way to fix these issues is seemingly to uninstall most if not all mods to put less strain on the game engine and allow it to render in NPCs, trains, and wildlife correctly. I have had numerous mods installed from both rdr2mods as well as nexusmods, from modded quarter horse breeds/coats, to environment texture overhaul/upscales, to the Arthur Morgan Upscale Project, 4K Story and Side Characters, realistic gun metals and wickedhorseman's Firearm Cosmetics, euphoria ragdoll mods such as C.E.R.R, A.E.M and W.E.R.O, as well as PDO and fixes to decrease ped accuracy, and several others. All the mods I use regularly only require lml, scripthook and dinput8.dll, and none require version.dll or any online content unlocker, but it doesn't seem to make a difference either way - more than just a couple mods being installed at once still breaks the open world's NPCs, trains, and wildlife from spawning properly. I have had to remove almost all my horse mods, gun mods, texture mods, and combat mods like PDO in order to get the open world populated correctly again. Basically I have next to no mods that I downloaded that I can use at this point. This comes as quite a huge letdown for me, as I was really enjoying getting into modding the game how I wanted it to be. But diminishing the open world into a mere shell of what it is supposed to be is simply too immersion breaking for me to be able to ignore.
I don't know why more people aren't talking about this, because it is a huge problem in my eyes, but I've basically found no information about this anywhere. Who out there that is into RDR2 modding has noticed these issues? Is there any solution to this that anyone knows of? I really don't want to have to delete all my mods, but at this point, it looks like that's the only way I can get the full intended single player experience of the game without watering down the open world and sacrificing immersion.