Earlier quoted context omitted.
I think you would be hard pushed to find any big tech company which doesn't do some kind of A B testing. It's pretty much required if you want to build a great product.
Yeah, that's why we didn't have anything anyone could possibly consider as a "great product" until A/B testing existed as a methodology. Or, you could, you know, try to understand your users without experimenting on them, like countless of others have managed to do before, and still shipped "great products".
Using A/B tests to safely deploy and test bug fixes and change requests? Totally different story.