Timing advance follows crank rpm IN PRACTICE, but so fast it seems to be advancing faster...The only timing that would stop an engine would be if it retards to AFTER top dead center..
Electronic ignition is set to advance to 28 BTDC and retard to about 4 BTDC, neither would cause the engine to stop...It can't possibly retard past the 4 or so degrees where it idles......An engine will run forever at 4 BTDC, just won't have any power......Normal timing reaches full advance at about 4000 rpm, and never goes beyond 28 no matter what rpm the engine turns...
TKG is lurking here somewhere, I'm sure he has some opinions...