Peter Krautzberger of the MathJax team suggested a way for all visitors (included anonymous ones) to enable or disable MathJax. He said:
"I believe this has some advantages.
- All users can get better math rendering but are not forced to have it
- Wikipedia would become accessible to all math-capable screen readers
(I've heard complaints that user registration is not not very accessible).
- Users get to vote with their feet -- usage data could indicate if MathJax
rendering quality is worth it."
This could be a intermediate step, exploring whether it makes sense to enable it by default (bug 36496).
See http://news.gmane.org/gmane.science.linguistics.wikipedia.technical/ for the full post.
However, there are some issues we'd probably want to resolve first, including i18n (bug 35038).
I also don't think the minified files in the source tree are ideal (some of which overlap), but apparently it's because MathJax has its own loading system that clashes with ResourceLoader.