Scientists of Reddit, had the "Great Dying", at the end of the Precambrian era never occurred. How would this of affected the evolution of life, and are there already studies about this event?

Did you intend to post this here? Because this is a question for /r/AskScience, not /r/AskHistorians.

Additionally, we don't allow counter-factuals of this sort, which we direct to /r/historicalwhatif (although again, I don't believe this falls within their purview either).