You quoted Giffords. That cite is worthless. I would expect you to reject the conclusions of the NRA as well.
Which gun manufacturers acknowledge that the microstamping is feasible? Glock, Ruger, and S&W are on record saying no.
You seem to think that this is some untapped market. Consider that no new semi auto handgun models have been approved in the entire state since this went into effect. CA is a big state, and there are lots of people. If a manufacturer could comply, they would certainly do so. It’s not like these companies don’t already sell a lot of models in CA. I can buy the Glock 17 Gen 3 all day long in CA (well, only 1 per month because CA is stupid). But if I want a gen 4, that’s no bueno because it doesn’t have magical unicorn tears powering the non-existent microstamping technology.
And this is what Harris did. She chose to take the state down the path of a slow ban on all new model semi autos in the state. And this actually goes against the stated purpose of the roster. There are also other requirements for a chamber load indicator (CLI) (tells you if there is a round in the chamber) and a magazine disconnect device (MDM). But because no new models can be sold in CA, these safety features are also not available in CA. Microstamping is preventing these safety features from coming to CA. The Roster is supposed to prevent unsafe hanguns from being sold in CA - but police are exempted from the roster. And those same police can sell the off roster firearms to private parties. That is also contrary to the stated purpose. No, the real motivation behind the microstamping requirement is to ban guns. And that’s why Harris is terrible.