Simplicity is the best bullet-proof bet. At #pyconus sprints i was reviving flask_principal with latest activities 10 - 12 years ago.
I was amazed pip install worked with THE LATEST version of Flask and Werkzeug. The test also (some 44) still worked. Snippets still work when i changed the from flask.ext.principal ... import to from flask_principal import ... . It's amazing!
The project is a single ~400 lines project, with well-thought decisions IMO.
Simple, straight-forward and ezy maint.
Sometimes contributors give maintainers insight.
Yesterday at Pallets during #pyconus sprints two people, luis and alexandra were looking to contribute and after deliberation found the spanish docs to be the perfect fit.
This caused a chain of events, including starting korean translations and a translation system revamp task for today.
We also identified many flaws with our translation instructions and processes.