This would be like if I worked on the core Windows SDKs and I could routinely test my changes against everything from Microsoft Flight Simulator to the Bing server code before I submit.
Googlers like to joke internally that Google looks like a race car from the outside and like Moving Castle from Hayao Miyazaki'a cartoon from the inside, but that's not the case at all. Comparatively speaking it's a race car inside and out, it's just that the insiders don't know how shitty things are elsewhere.
P.S. I heard Bing is different, but I have no visibility into it, so can't comment.
At the time, Azure was a joke (partly due to the fact that the initial teams were headed up by ex Office devs with no cloud experience, if I remember correctly). But Azure was cannibalizing the Bing team pretty hard. I hear that strategy worked and that Azure is in much more capable hands now.
