Has there been more than 80% automated test coverage achieved on projects?

Achieving over 80% automated test coverage in projects is possible but depends on many factors:

• Size and complexity of the project.
• Adoption of testing culture within the team.
• Use of appropriate testing tools and frameworks.

In practice, in mobile development (Android), it is common to achieve 70-80% coverage with unit and integration tests, especially if the project is initially designed with testability in mind. However, 100% coverage is rarely justified due to the costs and complexity of testing UI and some third-party components.

It is important to remember that the quality of tests is more important than their quantity.