> when they migrate from monolith to microservice: development is easier [...]
Not even that -- that idea is still highly debatable.
I would argue that it absolutely isn't easier, and the stepping-back-in-time of developer experience is one of the biggest problems with microservices.
Microservices in general, are way, way harder.
I agree. In a monolith architecture, though, you CAN do that (and many shops do.) That's where their pains come from when they migrate from monolith to microservice: development is easier, but reports are way, way harder.