EFI can be stupid simple, much simpler than a carb with all its mechanical gadgets, and typically does not require frequent upkeep.. I'd go the EFI route any day of the week.
Are we talking factory configuration? I'd spec a car (or retrofit one with a new system) that needed only the minimum of EFI components-- specifically a speed density system that does not require a MAF. Something like a 1992 Saturn (if we're sticking with 30 year old cars) comes to mind.
Manifold absolute pressure (MAP) sensor, throttle position, coolant temp sensor, air intake temp sensor, and O2 sensor for closed loop feedback, IIRC is all it would really need.
There were a few manufacturers that were steadfastly against MAFs, preferring speed density configurations. Chrysler was one of them and I believe Honda and Hyundai/Kia as well, possibly others. Sadly, more modern emissions requirements ruined all that and forced most engines to transition to MAF based air metering. Not saying MAF setups are inherently unreliable, but you're adding one more sensor to the mix that is not essential to EFI operation.