The analysis of recovered sequences does not fundamentally change our current understanding of early SARS-CoV-2 evolution, but it does make the hypothesis of a single-source wet market outbreak implausible.
The rooting of the tree (i.e. what the progenitor sequence is) is also more likely in clade A, i.e. the Wu-1 genome is not the ancestral genome; simlilar to what we find in academic.oup.com/mbe/advance-ar…, and
We should be prepared however, to revise these ideas and hypotheses further if and when more early sequence data emerge. I would not be surprised if these revisions are very significant (e.g. the timing of introduction).
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