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What medium-sized projects are really afraid of is that modules exist but do not have stable dependency directions and responsibility boundaries.

Not all projects should be fully SPMed as soon as they are modularized. The key lies in the boundaries and team readiness.

What is really difficult is whether third-party dependencies can still control the boundaries and upgrade rhythm after entering the project.

What is really difficult is how to avoid moving the coupling relationship into multiple new modules as it is.

What is really difficult is understanding what products, targets, and dependencies mean in the project boundary.

What really matters is that for the first time, you organize your code by module boundaries rather than by folder thinking.

It's not just a tool for installing dependencies, it's changing how Swift projects organize modules and boundaries.