My general opinion is that the ETF influence is neutral. They benefit "Big Money" more than the Average Joe, but on the other hand, Average Joe got another opportunity to enter the crypto space relatively early due to the way the "attention game" works. And financial products in general tend to benefit the elites, not the Average Joes, so the Bitcoin ETFs are nothing special either.
On one hand, you already have some Solana-based financial products. The ETC Group Physical Solana is perhaps the closest one to an ETF, and I don't remember hearing news about them halting the trading when Solana had outages.
But on the other hand, an ETF legally has to be always 1:1 backed as the coins are the property of the customer/investor, and thus in these situations they probably can't offer new shares, at least if the outage takes more time than a few hours. While the ETC group product also advertises itself as being 1:1 backed, the coins are property of the custodian, not the buyer. So legally I imagine it's easier to simply continue to offer the product to new buyers and taking the risk temporarily.
Of course it's possible that Solana fixes its problems until this ETF is approved (if it is) in 2025 or so. But it's a risky move, I agree.
Regarding the question of the poll, currently there are no other news about other altcoin ETFs. All "news" about Ripple, Doge, LTC, Chainlink and so on I have reviewed are pure speculation.