Distributor Vacuum Advance?

Different applications have different priorities. The methods used to provide timing for engines in different applications vary based on those priorities and the comprises that have to be made. In some applications it will make sense to have a locked distributor with no mechanical or vacuum advance. In other applications it will make sense to have a host of sensors and a sophisticated computer to control the timing. There probably won't be one method that is perfect for every application. Your going to have to be more specific about the application if you want to debate what the best method might be. Even then there will likely be more than one option.