What Are Your Biggest Challenges When Working with ETL Pipelines? or How Do You Optimize Performance

Wow, didn’t expect so many good tips!

Tried the Great Expectations thing and already caught a weird CSV column shift before it blew up.

Still fighting with API timeouts though—anyone got a favorite retry library? Python’s tenacity seems decent but curious what y’all use.

Also, +1 to mocking APIs. Gonna set that up next.