If I understand Piru's arguments correctly, the changes to the ixemul includes will affect anything compiled with them, even if they don't use v61 features and that's why running those programs under MorphOS will result in crashes. It's my understanding that with most libraries, compatibility with old versions can be maintained by not using new features, but that doesn't seem to be how ixemul is evolving. Someone who wants to write a 68k program that is compatible with MorphOS will have to use the old includes.
While I still agree that v61 ixemul should be renamed, someone mentioned the idea of unifying development across the Amiga architectures, as with the NList, Texteditor, and codesets projects. I think that's a good compromise, and would like to read other comments on its feasibility.