I sort of wrote about 9,000 words on the subject of “why”, as well as doing a podcast to that effect…but I’ll take another bang at it for you.
It’s a choice by gamers for how a specific set of players would like to play the game. For some folks, Skyrim is an RPG, and you go from quest to quest working your way through the story.
That’s a valid way to play.
For me, the fun of Skyrim isn’t the quests and story. They’re there, and I’ll interact with them, but the fun is actually feeling like I’m living in the world. That’s really only possible in a big open-world game like this; you can’t really get that same feel out of other RPG’s I love; The Witcher 2 or Dragon Age: Origins or Drakensang River Of Time are all very linear, closed-world dioramas and shoeboxes.
So. I want to “live” in the Skyrim world. And a mod like Frostfall forces a player into making decisions. Most of the time, those decisions aren’t very interesting…but the hope is that you get enough moments where the mod does ask you to make interesting choices. If I’m up around Windhelm, to I wear one set of mod that gives me more protection in combat, or do I wear another set that gives me more protection from the cold? A realistic needs mod might be making your character tired and hungry while you’re out on a journey…but what if you’re in a terrible spot to pitch a camp? Do you press forward with the negative modifiers to your combat skills and hope you don’t run into a fight you can’t handle, or do you chance it against the elements and build a camp in the middle of a snowstorm?
I love those decisions. I also love the way “immersion” or “realism” mods put me into the world.
As I said on the podcast, if you play a big, ambitious open world game like Skyrim, you’re gonna see some janky stuff happen. There’s no way around it, even “bug-free”, sometimes the engine is going to hiccup and you’re going to see stuff that totally reminds you that you’re playing a computer game. User interface can take you out of the moment, too. Gameplay moments can take you away. (When I see a player–even a frost-resistant Nord–plunge, fully clothed, into icy water that breaks immersion for me because I’m well aware that in a cold weather environment your main point of survivability is staying dry.)
Having to fret over provisions before undertaking a long overland journey brings me back. Having to carry around a good set of fur armor before I head to Winterhold brings me back. Having to craft camping supplies and waterskins brings me back. Hunting up my own food and cooking it brings me back. I love that stuff.
You may not.
It’s all about what you want out of Skyrim.