NYSE volume vs. NYSE composite volume
S&P 500 vs NASDAQ Composite
QQQ? No. You need to ask yourself: Should You Have a Tech Stock Allocation in Your Portfolio?
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NASDAQ 100 vs S&P 500 (QQQ vs VOO)
Depends what exchange the biggest growth companies of the next decade list on, which is pretty much unpredictable. The major tech titans of the last decade or two all happened to be on NASDAQ which has led to it's outperformance; there's nothing to say the next generation will be the same. QQQ could wind up being more of a value category of mature (or declining) companies. By way of example, Snowflake, Palantir and CloudFlare are all listed on the NYSE.
VOO is a bit more appealing for me in terms of absolute hands-off decades-long timeline type investing for that reason. For more active management, QQQ is probably still a more appealing bundle of companies right now (plenty of trash stocks in the S&P 500 that will be bankrupt or drop out sooner or later).
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