It will be nice to have a parameter e.g. $wgMathRendering allowing to set which method to render formulas should be choosable in the user preferences. So far it is only possible to set a distinct method as default for users. However other choices are shown, even if they are eventually not set up.
Pragmatically this setting could default to
$wgMathRendering = array(
MW_MATH_PNG, MW_MATH_SOURCE
);
Version: unspecified
Severity: enhancement