I recently had a moment where I really appreciated running most of our stack on open source system. Needless to say it was a weird interaction with the way flask handles files, boto/s3, flask admin, and a core mimetype util in python. A name was being set on a file stream as an integer which triggered a mime type check in boto, which caused the mimetype check to error because it expected a string. (I still have not figure why that name is being set on the stream of mostly excel file uploads.)

Needless to say, if I needed to go through some recent support hire from some enterprise service, it could have taken a long time to figure it all out. Reading the source made actually solving this much easier.

This is obviously not unique, as it is a core part of why open source is successful.

It would be great to hear of any other stories.