> I was planning to move to an equal weight index

The only substantial effect I've seen of the influencers who were doomsplaining this decision was some minor churn in retirement assets from low-cost S&P 500 followers to higher-cost funds. (The market, broadly, never priced in a rebalancing of the S&P 500. So this was almost entirely whipped up by influencers.)

Broadly speaking, if you were actually considering trading on the back of S&P's decision, or worse, if you actually did, consider trimming who you follow for financial advice.