Long term I'm expecting it to drop at least 45% to be on par with the 2000 drop (49%) and 2007 drop (56%). Each of those took a long time (2 and a half years, and 1 and a half year) to go from ATH to market bottom, much like this bear seems to be doing.
I was out of equities in 2019 and 2020 expecting a long drop then too. But I jumped back in as soon as the S&P 500 dropped 30% in 2 months because it dropped quickly (30% in 2 months) and looked more like 1987 (quick drop of 30% then rebound) than the 2000-2002 and 2007-2009 bears.
I think the S&P will lose a third of its value or more. Printing trillions in monopoly money is going to kill us.