We are considering removing support for the math3 theme in new versions of WeBWorK. The math3 and math4 themes use different versions of bootstrap (a css and js package). It would simplify the codebase considerably if we don't need to include both versions of bootstrap. (In some cases they can interfere with each other if we are not careful.)
Are there features of math3 which make it preferable to math4? If there are specific features we may be able to include them as options of math4.
Would eliminating the math3 theme in future versions of WeBWorK be a deal breaker? Let us know -- with specifics if possible.