It's a paradigm shift.

Meaning

It represents a fundamental change in approach or underlying assumptions.

Examples

• John: 'The move to cloud computing is changing the business landscape fundamentally.'
• Alice: 'It's a <b>paradigm shift</b>, I agree.'
• John: 'That’s a significant <b>paradigm shift</b>.'
• Alice: 'This new operating system completely rethinks user interaction.'