SAP Ariba.
Imagine you can test newly created catalogs, but on error you only receive an error ID, which you have to send to a support email to get the acual error message, but support only responds after maybe 2 weeks if you're lucky.
How hard can it be to implement a log viewer next to your catalog testing forms.

I was filling a questionnaire through SAP Ariba ..
The loading time, the way you can upload files. The tree structure of the questionnaire, and their date picker. Everything is perfect no struggle with it at all.

PS: I spent about 2 hours filling it and I am not done yet!

when you really wanna write an extension for this software but the only API is in node. gotta rewrite it for Ruby! 😓