The good thing is that, for hobbyists anyway, there are so many used and new-old-stock Z80s floating around that the immediate impact of this won't hit for a wh

The good thing is that, for hobbyists anyway, there are so many used and new-old-stock Z80s floating around that the immediate impact of this won't hit for a while. After that, there are plenty of soft core (fpga) Z80 clones, as well as emulators to run on modern microcontrollers. Zilog also has ISA compatible microcontrollers that can be retrofitted. It's unfortunate that the official Z80 is being retired, but the future of retro-computing is cycle-accurate FPGAs. I ran into similar issues with Motorola 68k builds. Many of the interesting processors are vintage. So, over time, any builds I open source would become increasingly difficult for folks to build. But, produce a cycle accurate clone core on FPGA, and this ISA can be preserved on a reasonable facsimile of real hardware for generations to come. Thankfully, Amiga enthusiasts have already taken the lead in FPGA preservation.