Paul was still at Apollo at the time that OSF/DCE picked Apollo's NCA/NCS as the RPC system.  I don't know when he left Apollo (or HP/Chelmsford after they bought it) for Microsoft, but it was before OSF died.  That latter happened because Sun (Rob Gingell?) insisted OSF stop doing all development as the price of ending the Unix wars and joining everyone in opposing Redmond.  We could no longer say OSF stood for Oppose Sun Forever.

I liked that NCA could handle env vars in pathnames, which Locus also had IIRC.  Domain also had "fat executables" similar to what Apple did when migrating across CPUs.  And their build and source system was recreated as ClearCase.