Well, what a mess I've made!

LOL
Nick, I have nothing to do with the development of CB-Emu... it's all Franz's work and responsibility.
I was just inviting you to use MAME. I only collaborate with the MAME development team, I don't make any modifications, as far as I'm concerned I always respect the original design. And I agree that if the original computer has a bug, so does the emulation.
Franz, I'm sorry, I have spoken out of ignorance. From what I usually read here, I thought that CB-Emu and its complements offered different options to the original MAME ones, such as higher clock frequencies, bug fixes, etc. You explain to me that these modifications are optional, and that seems perfect to me.
Honestly, I haven't played with CB-Emu for years... many years.
But I recommend it to all my friends for the convenience of having the roms included, for the extra options it provides, etc. I don't play chess nowadays... I spend my time doing repairs, restorations, reverse engineering, etc.