Google lost ~\$500bn in a day after its AI search hit ad sales. Rethinking my big tech weighting

Alphabet said its AI mode was eating into search advertising revenue, and the stock dropped by about \$500bn in value. My portfolio is roughly 70% global index, 15% tech ETF, 10% bonds, 5% cash, so I'm already heavily in the same names through both funds. I'm not planning to panic sell, but this made me realise how concentrated I actually am. Do you deliberately limit overlap between your index and sector funds?