Honestly I feel there’s no hope for CA and NY
Until the sea or the ice covers them, or the sun burns us up, or we all die of plague there is always hope.
However I do not see much chance of a reversal of their policies anytime soon, absent an external enemy.
The kind of people who seek to rule others (and particularly those who believe they must, for our own good) need the obedience of the people. When they can focus the attention of the people on an "enemy" their job is easier.
But, certain things require the "right" kind of enemy. Foreign nations, and foreign terrorist threats work against gun control. Look at the fact that for years after 9/11 gun control proposals got little or no traction. When there is an identifiable outside threat, most people realize that gun control does nothing about it, and might even put us at greater risk.
But, when there isn't much of an external enemy, our rulers tend to create one, an internal one. People who criminally misuse firearms to rob, or kill are, naturally, the "enemy" of decent people everywhere, so for the rulers, its an easy mark.
HOWEVER, putting the bad folks in prison and keeping them there for long periods of time runs smack into the currently popular social idea that criminals aren't really responsible for their acts, so severe punishment is less common than it once was.
The alternate they chose was to increase restrictions on everyone, rather than just those who actually are the problem.
IF we should be invaded by carnivorous aliens or suffer the "zombie apokyclips" I suspect you would see permits and backgound checks rapidly abandoned. Short of something like that, or a "Red Dawn" type scenario, I don't see NY or CA changing anything to relax their regulations.
Note how even a Supreme Court ruling resulted in NY passing increased restrictions tht go far beyond what they had prior, and "more than make up" for what SCOTUS struck down.
Time will tell.