The Importance of End-To-End Testing over Unit Testing

End-to-end testing is encouraged over unit testing for newer projects as it focuses on testing the functionality of the project rather than the implementation. End-to-end testing, like in the project 'get sim', provides a visualization of commits without testing specific implementations, allowing flexibility in project development. Testing images generated by the project ensures that changes in implementation do not affect the user experience. This approach offers a broader perspective on project performance, ensuring it functions as intended and providing better sleep and confidence. Unit testing, though valuable, can be time-consuming and may not always receive universal buy-in, leading to challenges in maintaining and updating tests. Focusing on main functionalities from top to bottom in the application can provide good test coverage and quickly identify significant issues. Additionally, conducting high-level tests can often reveal major problems resulting from changes in implementation details rather than intended modifications, highlighting the importance of a rigorous software lifecycle and thorough testing practices.