Leftpad, a one time event that was fixed very quickly with a solid permanent solution? Being able to use libraries that 5,000+ other people have already vetted

Leftpad, a one time event that was fixed very quickly with a solid permanent solution? Being able to use libraries that 5,000+ other people have already vetted for quality for you so you don't have to waste a couple of hours hand writing them? That's 2 pluses right there.