Ammeter bypass and aftermarket gauges.

There is another very dangerous downside to this simple “shunt wire” bypass.

True. I ran my ALT to BATT+ cable thru a fuse, in all my Mopars, plus the high-current diodes I mentioned. Easy to find a say 150 A, 32 VDC fuse you can bolt in-line. Or might use a "marine fuse" w/ holder and replaceable fuse. I did that in my home solar system batteries since 32 VDC rating doesn't suffice (51.2 VDC), but the marine fuses are rated higher (100 VDC? forget). In 1990's Magnum V-8 Jeeps, the thick cable from ALT to BAT+ runs thru a large fuse in the underhood fuse/relay box. I used that Jeep box in my old Mopars.