Much easier said than done, if there are 50+ devs working on the same service (monolith). Decisions are made much slower, improvements need to go through long discussions, deployments are much more risky, onboarding is a hassle, and so on. Sure, monoliths work very good for small teams (it's hard to define what "small" is), but I'd say that around 15-30 developers you can think about splitting up.