It seems it has been a long time since the MathJax has been updated on this site (probably MathJax 2.7 beta by @m0sa). So I was wondering if there is a plan to switch to newer version 3? (http://docs.mathjax.org/en/latest/upgrading/whats-new-3.0.html) It should supposedly have better performance...

Currently the stack exchange sites use MathJax v2 (see Which Stack Exchange sites use MathJax? for list of sites) which slowly becomes obsolete as new version 3.0.0 is in last beta. Since MathJax v3 is a major rewrite from v2, I would like to bring up this discussion on whether or when, there is ...