Expensive spells that discount themselves, like This Town Ain't Big Enough or Leyline Binding, were played alongside it in Standard before it eventually got banned
Thats huge in decks where you rely on your artifact creatures, engines, or token generators to stick around
Right now, control decks seem to be the most common place to find Locations, although I believe in the long run that aggro decks will adapt to use them as well
Neither of those things are major parts of Blues slice of the color pie
Indeed, one of the interesting things about Ranger is that you can lock in the 4/3 mode if you want it when your first hit is a non-land just by leaving it on top for round two of the explorations
Whenever you draw a card, each opponent loses 1 life