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It turns out that biogenesis on Earth was fairly rapid compared to geologic timescales. Using a conservative upper limit of 600 million years for conditions to be "stable enough" for life to emerge, the probability of biogenesis on terrestrial (Earth-like) planets is constrained to those older than 1 billion years, greater than $13\%$ \cite{Lineweaver_Davis_2002}. That is, about 1 in 10 Earth-like planets in the habitable zone should develop life.  \begin{quote}  $f_l \ge 0.13$  \end{quote}\\ \end{quote}  I am pretty confident life as we know it is widespread in the Universe: Microbial life is likely present in several places in our solar system as well as in a large fraction of the billions of planets in the cosmos.