Using swap isn't always a sign you need more RAM. Typically, if you use a computer for a while or have a lot of IO operations going on, Linux will decide to swap some things to make more room for cache.
Sometimes Linux just finds that you have a bunch of inactive app memory and it can swap that out to cache way more stuff. That's just good memory management, but it's not worth buying more RAM over
Yeah, but what if I want:
If not League of Legends, where else am I gonna get all of that from?