Single-class Apex often feels faster when building small features.Over time, logic, SOQL, DML, and UI handling get tightly coupled.This makes the codebase fragile and difficult to extend?

SOQL queries are often scattered across controllers and services.This duplication increases maintenance effort and security risks.Centralizing access simplifies long-term management.

Early-career professionals often see limits as frustrating restrictions.There is a tendency to bypass or work around them to meet short-term goals.Over time, this approach can lead to brittle and hard-to-scale systems.