Note that once the grass has grown past a certain height, you won't be able to use a mower anymore even if you want to. At that point it will require a line trimmer (a.k.a. weed whacker) which is a lot more work.

Though personally I'm a fan of "kill your lawn" efforts. You can smother it with cardboard (or burn it, or till it, etc) and replace with native meadow.