Low vacuum - should I ditch my vacuum advance distributor?

I've been doing a ton of looking into the same thing for another engine of mine.
The low vac cans are now unobtanium. The choice is either some sort of programmable unit (msd or progression ignition seem to be it - $535-550) or dealing with a poor tuneup.

If the car is meant for track only, or mostly track, then the vac advance won't be missed. But if it's more of a street car and you don't like overheating at every light, then having no vacuum advance kinda sucks. Plus the part throttle response gets sluggish.

Supposedly the Crane canisters were the ones to get. The adjustment inside affected the vacuum operating range, while the amount of advance added could be controlled with a cam inside the distributor. But since holley bought them, the parts seem to be gone.