Thanks for the explanation. What I do not understand is why is it then possible now to run Eudora Mail and Palm Desktop (PowerPC applications) inside a virtualized (not emulation) Mac OS X Server 10.6 (Snow Leopard) in VMware Fusion 11.5.3 in macOS 10.12 Sierra in Intel x86-based Macs.

In other words, that is running PowerPC applications in an Intel Mac using VMware Fusion virtualization (not emulation), thanks to Rosetta 1 (released by Apple in 2006).