Indie Hackers who use Serverless: What are your pain points (especially with monitoring)?

I'm building a service to keep track of latency and run tests on serverless functions. I'm looking to validate my idea, so I'm reaching out to the IH community!

1. What are your pain points with serverless computing (and especially serverless monitoring)?
2. Why did you choose to use serverless over traditional servers?
3. When/if your application crashed, why did it crash?

Thank you!