Ammeter Battery overcharge

I cry a little when people take out their ammeters.
It's like taking out your center inside rear view mirror, and relying on a digital readout to tell you how far the next car is behind you. Not nearly as much, or enough information.
You can have a reaalllly bad short for quite a while somewhere out in the body, and have a fire long before you notice a voltage sag especially while driving.
If that situation occurs with an ammeter, you will see a big discharge and be able to take immediate shutdown action.
Happened to me on July 4th.
Was only a 10 min. delay, not a ruined day.

My guess is you were just lucky enough to be looking at that gauge at the right moment.
Others can state a strong case for warning lamps, bells, and whistles. Gauges don't beg attention.
I've already stated why I replaced my amp gauge with a volts gauge.
As for the madelectrical bypass/mod, After one gets it done they just might find they haven't fixed a damn thing. Possibly made matters worse by moving the next point of failure to inside the cabin. That's the "mad" in madelectrical. LOL Opinions, everybody's got 1.