Thanks, I’ll try to find the PunyInform Discord server.
Of course, making an exhaustive list of what 8-bit systems don’t have a Z-machine is harder than the inverse… But it seems that ones running on 6502, Z80 and maybe 8080 (the latter two via CP/M) are well covered. Z-machines for various 8-bit platforms - #25 by 8bit_era
It would be fun to implement a Z-machine for 6800 (maybe via FLEX), but probably not very useful to the world at large.