My employer adopted microservices for a very specific reason: it became nearly impossible to deploy the monolith. With hundreds of commits trying to go out every day, probability that at least one would break something approached 1. Then everything had to be rolled back. Getting unrelated concerns into separate deployable artifacts rescued our velocity.

It came with many of its own challenges, too! A great deal of infrastructure had to be built to get from O(N) to O(1) infrastructure engineering effort per service. But we did build it, and now it works great.

There is a reason monoliths were traditionally coupled with quarterly or even annual releases gated by extensive QA.