Welcome to your interview.
The question is on your right: Build Versus Buy for Platform Capabilities. Take a moment with it first.
Talk your thinking through with me if you like - when you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes). Discussion and graded submissions share your five interviewer interactions, so spend them well.
You are advising a product and engineering organization that is deciding whether to build a core platform capability internally or buy it from a vendor. The capability affects multiple product teams, will shape future architecture, and could become expensive to change later.
How do you evaluate build-versus-buy decisions for core platform capabilities?