I think many (including myself) might think this is top priority because all major emulating has been pretty stable but these cores haven’t been updated much. Same compatibility issues for over years. Without .Dsk support, MSX core is useless. Period. For Pc-Engine CD-Rom, without full .Wav+cue+iso support, it’s a shame to even include core to Retroarch. It simply is useless for now.
So yes, this is major issue for me.