One possible reason is that people tend not to upgrade their fonts. Therefore, old and buggy versions would remain out there, and lots of people copy fonts from

One possible reason is that people tend not to upgrade their fonts. Therefore, old and buggy versions would remain out there, and lots of people copy fonts from their friends instead of getting them from the source. It's a difficult problem: what's better for free software? Sticking to our principles of open development even for assets, or ensuring that potential new users see a high-quality, finished product? I don't know the answer.