Volatility in and of itself is nothing new to the markets. Things like climate change, global debt levels, and record long US government shutdowns/Brexit/populist nationalism are not normal, but we hope they are not worse long term than WWII, great depression, etc.
At the end of the day, you have to make a judgement call on where you currently are and what asset allocation you are comfortable with. Bogleheads use a test - asses your need, ability, and willingness to take on risk. Take your time with that concept, it has done a lot for me over the years. But it is not optimal (not expected to produce the highest balance over the majority of 30 year periods) to be at 100% equities.
Even at 90/10 - equity/bond allocation and re-balancing will both smooth returns and improve your chance of ER success. If you are shooting the moon hoping to catch up on growth for the next 20 years, there is a good chance that 100% equities will outperform in accumulation (but could also fall catastrophically short), but then you really do have to switch to holding some bonds to improve your outcome in the drawdown phase, as long as it is expected to be 30 years or less.
There really is no reliable research on optimal allocation for drawdowns of 40 years or more, which makes me question what the 30 yo ER's rely on if not hustle income to ensure 4% SWR success for potentially 50 years or more. Many of them are 100% equities which reflects either having more than enough NW to weather a downturn (say, a 3% SWR) or sufficient hustle income. Guess we will eventually see what happens! But I'm ultimately looking out for myself, their advice is only a starting point to help you to get you thinking for yourself. Maybe start your own blog about what you learn and want to share with others!