This one was both surprising to me, but having worked on an app with >100 engineers, also less so. The challenge is how with 100 engineers you typically still

This one was both surprising to me, but having worked on an app with >100 engineers, also less so. The challenge is how with 100 engineers you typically still want to ship 50-100x as much as with 1 engineer. And all those small features that the 1-3 mobile eng-sized teams work start to have unwanted/unexpected impact on each other, bringing down collective app stability. Also, the >100 Engineer apps are typically used globally, with often millions of users. Many of the crashes will come on Android, on exotic hardware / old OSes, in my experience. It is fascinating, regardless.