I'm perplexed why you just apply the learnings that a company like AWS has gotten to a company that has up until recently clearly been struggling with scale.

That some company has solved something doesn't mean another company can just use it. You can't just "from aws import scale" at the top of your fresh new project and be fine with millions of concurrent users.

I think you maybe misunderstood the parent comment, I don't they were saying that AWS figured out scaling their physical infra so therefore Blizzard could figure out scaling their physical infra.

I think they were saying that tools like AWS -- which provide access to near infinitely scalable infra on demand -- are now commonplace which make scaling greenfield projects much easier than it was 20 years ago.

I don't know about blizzard but a lot of game providers do run on hyperscalers nowadays so I understand what they're getting at.