So like monoliths vs microservices it's probably a balance between the two (leaning heavily in one direction).
I've never understood why it needs to be either/or. Is it really that difficult to support a microservice deployment that only represents 50% or even 20-25% of the org/project?
Occasionally companies actually do this by fragmenting divisions into separate companies, such as outsourcing IT. It has a very broad range of outcomes, from saving to destroying the business.