This chart compares the S&P 500 to the Russell 2000 from 1/1/97 to 12/31/99. Small cap was dead. There were headlines and TV segments devoted to why small cap will not work, yada yada yada.
There is no reason to disagree or agree with Faisal's statement. This chart pattern will repeat in the future.
I'm sure reader OG will get on me here but patterns and cycles repeat. Large cap to small cap and back to large is one of these cycles. It does not make sense to give up on either one.
At times you will favor one over the other and you will be right on that call sometimes and wrong other times.