A basic LaTeX feature which I sometimes miss when asking and answering questions in MO (specially when the question and the particularly the answer are longer) is the possibility of numbering equations for cross referencing. I tried to do it naively a couple of times but it never worked. I also looked into the MO help pages to figure out a way to do it, to no avail. I do not know if there is an intrinsic limitation in MathJax for implementing such a feature, but I believe it would be quite helpful to be able to do so. I would be happy enough with just simple numbering and then cross referencing bare-handedly. Fully-fledged,
\eqref-style cross referencing would probably be overkill since questions and answers are not that long.
If it is indeed the case that numbering and cross referencing of formulas is currently not possible in MO, is it feasible to implement such a feature? If that is the case, would it be helpful for other people in the MO community as well? Thanks in advance.