The "Goldilocks" idea may need to be modified. It appears there is a real possibility of life arising on a moon of Jupiter or Saturn and both are outside of our "Goldilocks" zone. We may find that life is not only common but ubiquitous in the universe.I believe it will be about applying Google AI to finding planets. We will likely find that EVERY sun has multiple planets.
There is a fundamental problem when it comes to the possible existence of "Goldilocks" planets. Physicists say there is a small likelihood of any star having more than one habitable planet. To have two, they would have to be on identical orbital paths in transverse orbits around their sun at identical speeds, a very unlikely scenario. Otherwise, two such planets in the same general vicinity would eventually collide due to gravitational attraction or they would become binary planets, causing neither to be life-sustainable due to the wild swings in distance from their sun and volatility from the constant gravitational pull on each other.
As to binary planets, their volatility may prove to be a boon to life not unlike our seasons, ice ages, storms, and periodic asteroid impacts.