> Two QA per dev?? That seems ginormous to me. What am I missing about the narrative about evil corp sending all of QA packing, that seems not supported here?

I think you're underestimating the QA burden for large parts of the company. When I worked in payments at MS, the ratio of QA to dev after the cuts was probably on the order of dozens to one, if not a hundred or more once you threw in Xbox/Windows/etc accessibility QA from across the organization and all the other people like lawyers involved in handling over a hundred jurisdictions. I was little more than a frontend line cook and even I had three QA people reporting directly to me; two of them helping write tests so they ostensibly should have been automating themselves out of a job.

There is a lot of manual testing when you have a complex system like that where not everything can be properly stubbed out, emulated, or replaced with a test API key. They also have to be kept around to help with painful bursty periods (for us it was supporting PSD2, SCA, or 3DS2, forgot which). Payments is obviously an outlier because there is a lot of legal compliance, but the people I knew in Cloud/Windows also had lots of QA per dev.

I wouldn't be surprised if the degradation in feature parity of newer Windows software was a result of this loss of QA. Without the QA, the developers have to be less ambitious in what they implement in order to meet release schedules, and since they don't have experienced QA they can't modify the older codebases at all to extend them.