It's also extremely interesting to think about how much the statistics or thought process will change if we just find _one single additional planet with life_ - then what kind of life, etc.

Somehow finding a second planet with life seems statistically infinitely more significant - the whole thing right now is a data experiment, and for now earth (as far as we know) is an anomoly - a single "positive" data point across thousands and thousands of "negative" data points.