Do you have any sense of how durable the CFW bolts are? It's my impression that the alloy is not as strong/hard as steel. With how expensive they have gotten, I'm a little concerned over whether the fixed firing pin may wear or break over time, and if so, whether it could be repaired or not.
I have some useful data regarding CFW bolt's durability. I received my Gen 2 bolt (no engraving, replaceable firing pin) in May 2016. I installed an ILWT stainless steel firing pin in the bolt. From 5/29/16 through 2/22/24, I fired 19,280 rounds through my gun using this bolt. The ammo was almost exclusively S&B 115 gr FMJ.
So far, I can't detect any wear on the bolt beyond surface abrasions. The sear, firing pin, ejector rod, and recoil spring guide rod are all sound. I installed a new recoil spring in 2020 to fiddle with the rate of fire. Sam at Practical Solutions did some minor work on my bolt that year to get it to run right in my Gray Ghost Upper. The sear notch, which is where I expected to see the most wear, is in really good shape.
I realize this doesn't directly address your concern about the fixed firing pin in the CFW A bolt, but if overall wear over time on other parts of the bolt is any indiction, I think the CFW A bolt will last a good long time.