The 0DTE on index has flattened the surface, so I would assume this will continue the trend until we get a crash. No real opinion on daily VIX other than it’s convenient to be able to mark your hedge exp to your index.
I don’t think it will have much impact in terms of 0DTE spec in SPX. Say you’re short the degen strangle 0DTE in SPX and buying the combo in VIX. Say your VIX combo earns 40 bps… you’re buying a lot of VIX. Great for the CBOE but not feasible for the end user.
It will be interesting to see where the dailies price immediately after monthly futures roll due to the contango (futures/cash) People are going to get f*cked.