Quality control and stability issues aside, a working vacuum advance negates the need for a high initial (static) timing setting (less starter bucking, easier starting) and gives the tuner another tool to select the proper timing for any combination of load and RPM.
If you really want to add fuel to the fire (pun intended), you can get into dual pickups for stretching dwell, and reworked Ford reluctors with grooved timing veins for multiple coil discharge. You can also machine multiple roll pin grooves in the reluctor for phasing in unison with the rotor, and use an old MSD Adapt-A-Cap (Ford cap) to prevent crossfiring.