Timed or manifold vacuum advance?

TurdFerguson said

I was pointing out a scenario where someone would substitute manifold vac for a tailored 'higher initial' in order to set throttle blade position low enough to avoid idling on the main circuit....but when you open the throttle the vac go's away...and so does all that added timing.....

Click to expand...

It would have been VERY helpful if you had simply said this and been done with it.