SR has less weapons, but you can enjoy the game normally with every one of them (daggers are a must have for assassins for example rather than something you would take only for RP reasons).
Additionally, exploring the world and dungeons is also rewarding and makes you feel like the world is alive, something that makes you feel more like you are there (something that is VERY important for RPG's).
Than we have Alchemy, Smithing and Enchanting, great ways to make money and live without going into combat.
And Perk System which greatly improves the RPG aspect.
Don't look at join date but at their posts. If you bothered to read them you would see that MANY of them played MW (and honestly, your posts on this forum makes you sound like a MW fan who is afraid that too many people will accept SR as a better game). And do mind that you are not automatically joined in the forum after you start playing the game. Many people may have played MW in 2002 but joined only now because they needed to post something (help in quest) or because they couldn't take to go on next level of fanboyism and join the forum because they loves SR too much. And of cours,e some join because they hate SR too much
I played MW for years and replayed it more times than I can count and I can without any doubt say that Skyrim is a better game.