That's all true. However, a few people here want to start fights over something that, as you correctly pointed out, hasn't happened, yet -- something which may never happen.
Wasted energy.
I'm thinking decades from now. The anti 2a are good at the long game. Look at how many gun laws were passed since the 60's to now. Each step of the way, I'm sure some gun owners said "yeah, that makes sense".
That's why I brought up another example of a 15rd mag. Gun makers would have to redesign the gun. 1 that only fits a 10rd mag and 1 that fits above that.
I assume the CA law has a grandfather clause. But what happens if one just doesn't want the gun anymore. They can't sell it, so that's lost money. Or 1 can't hand it down to their kids, etc...What happens if CA makes a law for existing Glocks or like to have a "featureless" thing like how they do with semi-auto rifles.
IMO, it's not just a ban on any gun that can fit the switch. It's 1 more ban that's 1 more step to less 2A rights.
I often use the example if all gun makers, accessories said "we wont sell to any LEO agency unless their voters can buy it", then there won't be as many gun laws as there are today. Because the LEO agencies would tell politicians to not ban things.
If we use HI's AWB bans as proof, then some years the ban had a grandfather clause, others they didn't. Same with rifle mags. Add to that the non-transferability due to death of the owner. Then add in if Bruen didn't happen or the total disregard for Bruen like how HI made sensitive places, then what's to stop states like CA, HI from banning much more than just a gun that can fit a switch. No grandfather clause because HI will say "F-U, sue us".
The above is my opinion and you have yours. I'm just elaborating more on why I have this opinion. I'll end it here. Thank you for your views.