When to use Apex vs flow?

I'm curious about the best use cases for Apex and Flow in the context of blockchain development. Can you help me understand when it's more appropriate to use Apex over Flow, and vice versa? What are the key factors I should consider when making this decision? Is there a particular type of project or application that Apex or Flow excels at? I'm eager to learn more about how these two platforms differ and how they can best serve my development needs.