@rc2014
I can confirm that Microsoft FORTRAN-80, MACRO-80, LINK-80, LIB-80, and CREF-80 are also still fully operational, as is the Apple II version of Microsoft Adventure.
I haven't yet had a chance to check EDIT-80, COBOL-80, MuMATH-80, MuLISP-80, Multiplan, or BASIC Compiler.