_courier_6_: These features are only enabled if and when the program requires them and many of them can be blackliste (in otherwords disabled), otherwise they are left inactive and the program really doesn't take up much more memory than 100MB, which is not a lot considering what the program does. it is much less bloated than counterparts such as Nexus Mod Manager (Old and Outdated), FOMM or Vortex. It plays no part in the performance of the game and the game remains unaffected by the program. Most experienced modders will advise you to use this and a large amount of mods specifically recommend it over all other programs.

smuggly: I use FOMM is that the same thing?

_courier_6_: It's been many years since I have used FOMM so I don't believe I can give you a satisfactory answer. Last time I used FOMM it replaced files, which, to me wasn't the best method of modding as it would mean I would have had to verify my game files each time I messed up a mod install that replaced vanilla files which were not stored in a BSA file.