Oxygenic photosynthesis appears to be necessary for an oxygen-rich atmosphere like Earth's.
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The duration of the interregnum would have been determined by the rate of hydrogen escape and by the size of the reduced reservoir that needed to be oxidized before O became favored.
We suggest that continental growth has been influenced by hydrogen escape, and we speculate that, if there must be an external bias to biological evolution, hydrogen escape can be that bias.
The oxygen atmosphere wasn't here to stay, however.
"It was a raucous time," stated Carnegie's Andrey Bekker.2 "Volcanoes peppered the Earth's surface, belching gases and particulates into the atmosphere.
This is a bit advanced biochemistry, but we think this biological revolution emerged sometime before 2.7 billion years ago," he continued.