You do buy macs right?
Personally: no. I spent not one penny on Apple hardware. The only Apple product that I ever owned was a refurbished first generation iPhone (iOS 3.x) that was gifted to me. Less personally: I'm empathetic towards people who might rarely find enough money to buy a Mac (new or used) but not enough additional money to invest in solid state. But all of that is quite off topic so please, let's get back to …
The first golden masters:
https://forums.macrumors.com/posts/23353701 and today's red alerts under Loss of data.
I don't have any GM.
Please, can someone with GM on two or more Macs test whether the losses – with those types of file – are reproducible?