Random idea! MAME Arcade Designer, a PlatformIO-like thing built on MAME where you architect totally original arcade systems with any emulated component like processors, audio chips and DSPs, or use an existing machine spec and develop new games that run on real arcade machines.
I mean
Given how modular the codebase is at this point, given a clear enough spec you could already pretty much auto-generate the necessary code for a given driver file, the only real wildcard is any glue code.
So yes, this needs to happen. ...You do it. 
