I've seen companies where a team was managing 10 services and companies where a team was managing one endpoint The former had some stressed principal engineers

I've seen companies where a team was managing 10 services and companies where a team was managing one endpoint The former had some stressed principal engineers, the latter was terribly inefficient and people had 1% productivity. There is a happy medium, but nobody can manage a large headcounts without splitting in a lot of tiny products. The core product of shopify is not something that needs 10k engineers for maintenance, even if they can afford that.