Years ago, long BC, I was at a tech conference and the CTO of a local tech giant gave a talk on micro services that was very good and touched on some of these s

Years ago, long BC, I was at a tech conference and the CTO of a local tech giant gave a talk on micro services that was very good and touched on some of these same points. They, in fact, refactored in the monolith and then broke it out into micro services but, surprisingly, never shipped the refactored monolith ... they just kept it running full test suites as more and more of its features were carved off into micro services until the test suites were running entirely on the micro services. They shipped that. During the Q&A somebody asked a question about their company's struggle to move their monolith to micro services and the CTO asked two questions that, at the time, was very illuminating: how many teams did they have and how many developers were in their tooling team. When they said they had a relatively small team the CTO said "you don't have any of the problems micro services solve, why are you switching".