Hopefully we'd never rewrite Haskell - there's enough people here that know it and Haskell is extremely easy to understand.

The team rewrote from Go to Python for various reasons:

* Tool support (debugging, etc) was supposedly poor

* The standard library wrappers were supposedly buggy

* They had to write a lot of wrappers and libraries themselves

* People on the team were already familiar with Python - after Atlassian's single "Go developer" left, there wasn't much reason to keep it