Summary & Key Takeaways ​

• EVE Online is commencing its migration from Python 2 to Python 3.
• The game has run on Stackless Python since 2003.
• The migration involves 2.4 million lines of code and manual review of 20,000 differences.
• They previously replaced Stackless in their Carbon engine with an open-source scheduler.

Our Commentary ​

Wow, EVE Online still running on Stackless Python 2.7? That's a relic! This migration is going to be an absolute beast. 2.4 million lines of code, 20,000 manual reviews... I can only imagine the war stories that will come out of this. It's a stark reminder of the long-term technical debt in large systems. Good luck to them, they'll need it.