The Shift Around LOW: ApiClient Singleton — Hard

The industry's obsession with singletons reveals a deeper truth: tightly coupled systems are harder to fix. Every app will thank you when you can swap a sluggish call with a mock instead of enduring endless integration nightmares.

• Decoupling isn't just proper design - it's scalability.
• Testing clarity comes from being able to replace mocks.
• Invest in architecture early; refactor later is a myth.

Here is the deal: A single shared instance sticks everything together. It's unclear who's responsible when things break - a developer or design flaws.

But there is a catch: rigid systems like this harm maintainability unless tools exist to swap layers. The solution is simple registration but transformative.

• Testability jumps from 10% to 95%.
• Flexibility means picking a mock when debugging.
• Normalization makes support easier.

The bottom line: Your next feature should force you to reevaluate singletons. Low impact but huge gains.

Stay curious, architect smart. Every system grows hungrier - iron out dependencies before they encrypt your code.