I think this probably scales to team size more than the app scale itself. I've worked on high scale apps before where I was a full stack developer, because we o

I think this probably scales to team size more than the app scale itself. I've worked on high scale apps before where I was a full stack developer, because we only had a few engineers on the team. When you have 20+ engineers, it makes sense to specialize. When you have 3, it's a huge hit to your productivity. The scale of the app is mostly irrelevant to this.