[ripberge]

Adding in a machine boundary does not guarantee loose coupling. If a dev does not have the skills to make a loosely coupled monolith, how they can they suddenly have the skills to make a collection of loosely coupled services running on more machines? That same low skilled dev is going to have to deal with a lot of other complexities now...

[revskill]

The point is, to keep the sprint in velocity, let's just keep the bad code (tech debt), but make sure it won't break the quality of original system. By extracting "bad parts" into its own system, you can manage it efficiently.