Justin Inklen and Serato are still in talks with bring SSL2.4+ to work with MixEmergency. As djpoproxxx pointed out unless you need to use one of the new Rane Mixers there is no need to upgrade to SSL 2.4. You can always use a SL 1,2, or 3 with the new Rane 62&61 and midi map it to MixEmergency. MixEmergency is no were near obsolete and won't be any time soon.