It depends on how close you are to retiring. If you are more than 10 years away, you are probably better off doing nothing differently. Look at the inevitable dip as a buying opportunity.

Even if you are close, you still need to be careful. Yes, the market is probably due for a 40% haircut at some point. But if it takes another 3 years to get there, then the market might increase more than that before then.

There are funds that track the entire S&P 500, but omit those 7 large Tech companies, and their performance has consistently lagged behind the whole index. If you thought years ago that the Tech sector would be do for a correction and backed out of those 7 companies while keeping the rest, you would be objectively worse off.