If only someone still has the infamous Tehkan World Cup soccer (likely a bootleg either only found in Greece or nearby regions) that Pete/kazzy described, that would make his day once it is supported in MAME. And also if Seibu Cup Soccer can ever be emulated. Those were his remaining wishlist items iirc.
The audio sounds of his game Gremlin/Sega's Borderline being discrete analog audio ever being emulated in a netlist environment is another matter.